sign.

A visible fact that shows that something exists or may happen.

Their angry expressions were a clear sign they didn't want to talk.

Those clouds show signs of raining soon.

A visible fact that shows that something exists or may happen. An omen.

"It's a sign of the end of the world," the doom prophet said.

A visible fact that shows that something exists or may happen. A property of the body that indicates a disease and, unlike a symptom, can be detected objectively by someone other than the patient.

Signs of disease are objective, whereas symptoms are subjective.

A mark or another symbol used to represent something.

The sharp sign indicates that the pitch of the note is raised a half step.

I gave them a thumbs-up sign.

Physical evidence left by an animal.

The hunters found deer sign at the end of the trail.

A clearly visible object, generally flat, bearing a short message in words or pictures.

The sign in the window advertised a room for rent.

I missed the sign at the corner so I took the wrong turn.

A wonder; miracle; prodigy.

An astrological sign.

Your sign is Taurus? That's no surprise.

Positive or negative polarity, as denoted by the + or - sign.

I got the magnitude right, but the sign was wrong.

A specific gesture or motion used to communicate by those with speaking or hearing difficulties; now specifically, a linguistic unit in sign language equivalent to word in spoken languages.

Sign language in general.

Sorry, I don't know sign very well.

A semantic unit, something that conveys meaning or information (e.g. a word of written language); (linguistics, semiotics) a unit consisting of a signifier and a signified concept. (See sign (semiotics).)

A military emblem carried on a banner or standard.

To make a mark To seal (a document etc.) with an identifying seal or symbol.

The Queen signed her letter with the regal signet.

To make a mark To mark, to put or leave a mark on.

To make a mark To validate or ratify (a document) by writing one's signature on it.

To make a mark More generally, to write one's signature on (something) as a means of identification etc.

I forgot to sign that letter to my aunt.

To make a mark To write (one's name) as a signature.

Just sign your name at the bottom there.

I received a letter from some woman who signs herself ‘Mrs Trellis’.

To make a mark To write one's signature.

Please sign on the dotted line.

To make a mark To finalise a contractual agreement to work for a given sports team, record label etc.

To make a mark To engage (a sports player, musician etc.) in a contract.

To make the sign of the cross To bless (someone or something) with the sign of the cross; to mark with the sign of the cross.

To make the sign of the cross To cross oneself.

To indicate To communicate using a gesture or signal.

To indicate To communicate or make known (a meaning, intention, etc.) by a sign.

To indicate To communicate using gestures to (someone).

He signed me that I should follow him through the doorway.

To indicate To use sign language.

To indicate To furnish (a road etc.) with signs.

To determine the sign of

To determine the sign of To calculate or derive whether a quantity has a positive or negative sign.