open.

Physically unobstructed, uncovered, etc. Able to have something pass through or along it.

Come in – the door's open.

The ice has cleared and the channel is open again.

Physically unobstructed, uncovered, etc. Not covered, sealed, etc.; having an opening or aperture showing what is inside.

The jewellery box was lying open.

Don't just stand there with your mouth open!

Physically unobstructed, uncovered, etc. Not physically drawn together, folded or contracted.

She greeted them with open arms.

The book was open at page 23.

Physically unobstructed, uncovered, etc. Of a space, free of objects and obstructions.

It was a large, open room.

Most of the site was occupied by huts, but there was an open area in the centre.

Physically unobstructed, uncovered, etc. Resulting from an incision, puncture or any other process by which the skin no longer protects an internal part of the body.

an open fracture

Physically unobstructed, uncovered, etc. Unlocked or unlatched but not physically open.

Physically unobstructed, uncovered, etc. In a position allowing fluid to flow.

Physically unobstructed, uncovered, etc. Of a sandwich, etc.: composed of a single slice of bread with a topping.

open sandwich

Physically unobstructed, uncovered, etc. Not of a quality to prevent communication, as by closing waterways, blocking roads, etc.; hence, not frosty or inclement; mild; used of the weather or the climate.

an open winter

Able to be used or interacted with in some way. Available for use or operation.

Your bank account is now open.

Phone lines open at 10 pm.

Able to be used or interacted with in some way. Actively conducting or prepared to conduct business.

Banks are not open on bank holidays.

Able to be used or interacted with in some way. Allowing entrance to visitors or the public.

I hereby declare this fete open.

The school has an open day on Saturday.

Able to be used or interacted with in some way. Receptive.

I am open to new ideas.

Able to be used or interacted with in some way. Susceptible or vulnerable (to the stated means).

open to question; open to attack; open to criticism

Able to be used or interacted with in some way. In current use; connected to as a resource.

I couldn't save my changes because another user had the same file open.

Able to be used or interacted with in some way. Running.

You're getting short of memory because you have too many apps open.

Not hidden or restricted.

Not hidden or restricted. Not concealed; overt.

It is a blatant example of open criminality.

Not hidden or restricted. Of a person, not concealing their feelings, opinions, etc.; candid, ingenuous.

Nowadays people are more open about their sexuality.

Not hidden or restricted. Public.

He published an open letter to the governor on a full page of The New York Times.

Not hidden or restricted. Written or sent with the intention that it may made public or referred to at any trial, rather than by way of confidential private negotiation for a settlement.

You will observe that this is an open letter and we reserve the right to mention it to the judge should the matter come to trial.

Not hidden or restricted. With open access, of open science, or both.

We hope that all aspects of the project will be open rather than paywalled.

Not hidden or restricted. Made public, usable with a free licence and without proprietary components.

Not hidden or restricted. Of a tournament or competition, allowing anyone to enter, especially or originally irrespective of professional or amateur status.

Not hidden or restricted. Characterised by free-flowing play.

Compared to their last match, which was a dour and defensive affair, this was a very open game.

Not completed or finalised. Not settled; not decided or determined; not withdrawn from consideration.

an open question

to keep an offer or opportunity open

Not completed or finalised. Not fulfilled or resolved; incomplete.

I've got open orders for as many containers of red durum as you can get me.

Not completed or finalised. Not having one end joined to the other; not forming a closed loop.

an open curve, an open circuit

Not completed or finalised. In a position such that a circuit is not completed, preventing electricity from flowing.

Not completed or finalised. Having different first and last vertices.

Not completed or finalised. Ending in a vowel; not having a coda.

Having a free variable.

Which is part of a predefined collection of subsets of X, that defines a topological space on X.

Of a note, played without pressing the string against the fingerboard.

Of a note, played without closing any finger-hole, key or valve.

Uttered with a relatively wide opening of the articulating organs; said of vowels.

Uttered, as a consonant, with the oral passage simply narrowed without closure.

Source code of a computer program that is not within the text of a macro being generated.

Having component words separated by spaces, as opposed to being joined together or hyphenated; for example, time slot as opposed to timeslot or time-slot.

Of a club, bat or other hitting implement, angled upwards and/or (for a right-hander) clockwise of straight.

To make or become physically unobstructed, uncovered, etc. To make or become accessible or clear for passage by moving from a shut position.

Turn the doorknob to open the door.

The door opened all by itself.

To make or become physically unobstructed, uncovered, etc. To make or become clear by removal of objects and obstructions, so as to allow passage, access, or visibility.

The icebreaker opened the channel.

The ice melted away and the channel opened.

To make or become physically unobstructed, uncovered, etc. To unseal or uncover, or become unsealed or uncovered.

You can open your eyes now!

Her eyes opened wide.

To make or become physically unobstructed, uncovered, etc. To spread; to expand into a wider or looser position.

to open a closed fist

to open matted cotton by separating the fibres

To make or become physically unobstructed, uncovered, etc. To make (a bed) ready for a patient by folding back the bedcovers.

To make or become physically unobstructed, uncovered, etc. To reveal one's hand.

Jeff opens his hand revealing a straight flush.

To make or become physically unobstructed, uncovered, etc. To move to a position allowing fluid to flow.

To make or become physically unobstructed, uncovered, etc. To angle (a club, bat or other hitting implement) upwards and/or (for a right-hander) clockwise of straight.

To cause or allow a gap to form or widen.

Mudchester Rovers opened a sizeable lead on their rivals.

A link opened under the strain, and the chain came apart.

To cause or allow a gap to form or widen. To move to a position preventing electricity from flowing.

To make or become available for use or interaction. To make or become operative or available.

He opened a secret bank account in Switzerland.

We're opening the phone lines in ten minutes.

To make or become available for use or interaction. To make or become accessible to customers, clients or visitors.

I will open the shop an hour early tomorrow.

The summer fete was opened by the mayor.

To make or become available for use or interaction. To make or become receptive or susceptible (to something).

Reading this book will open you to new ideas.

This policy will open the government to criticism.

To make or become available for use or interaction. To connect to a resource (a file, document, etc.) for viewing or editing.

I can't open the file because someone else is editing it.

To make or become available for use or interaction. To turn on; to switch on.

Please open the lights, the (electric) fan, the TV.

To start or begin. To start (an event or activity) as the first performer or actor.

The show was opened by a terrible Elvis impersonator.

Our band opened, and they came on second.

To start or begin. To precede another as a performer at a concert or show.

Our band opened for Nirvana.

To start or begin. Of an event, activity etc., to start or get underway.

The meeting opened with a statement from the chairman.

To start or begin. To bring up, broach.

I don't want to open that subject.

To start or begin. To enter upon, begin.

to open a discussion

to open fire upon an enemy

To start or begin. To start running (a program or application, especially one with a screen-based interface).

Click this icon to open Microsoft Word.

To start or begin. To begin a side's innings as one of the first two batsmen.

To start or begin. To bet before any other player has in a particular betting round in a game of poker.

After the first two players fold, Julie opens for $5.

To make an open relationship or marriage, i.e., with possible additional relationships.

To disclose; to reveal; to interpret; to explain.

Open or unobstructed space; an exposed location.

I can't believe you left the lawnmower out in the open when you knew it was going to rain this afternoon!

Wary of hunters, the fleeing deer kept well out of the open, dodging instead from thicket to thicket.

Public knowledge or scrutiny; full view.

We have got to bring this company's corrupt business practices into the open.

A defect in an electrical circuit preventing current from flowing.

The electrician found the open in the circuit after a few minutes of testing.

A sports event in which anybody can compete, especially or originally irrespective of amateur or professional status.

the Australian Open

The act of something being opened, such as an e-mail message.