expansion.

An act, process, or instance of expanding.

The expansion of metals and plastics in response to heat is well understood.

An act, process, or instance of expanding. The fractional change in unit length per unit length per unit temperature change.

Look up the expansion of 1018 steel at stick welding temps and figure out how far this thing's gonna bend once we weld it up.

An act, process, or instance of expanding. A new addition.

My new office is in the expansion behind the main building.

An act, process, or instance of expanding. A product to be used with a previous product.

This expansion requires the original game board.

An act, process, or instance of expanding. That which is expanded; expanse; extended surface.

An act, process, or instance of expanding. The operation of steam in a cylinder after its communication with the boiler has been cut off, by which it continues to exert pressure upon the moving piston.

An act, process, or instance of expanding. The replacement of a short name (e.g., acronym, initialism, alphanumeric symbol, abbreviation) with the longer name that is synonymous with it, as when spelling out acronyms to ensure clarity for a general audience.

Expansion of acronyms is often helpful for nonexpert readers (anacronyms excluded).

An act, process, or instance of expanding. The replacement of a short name (e.g., acronym, initialism, alphanumeric symbol, abbreviation) with the longer name that is synonymous with it, as when spelling out acronyms to ensure clarity for a general audience. The string of text thus substituted.

The acronym "FNDs" can mean either "functional neurologic disorders" or "focal neurologic deficits", so you'd better use the expansion instead of the acronym, for clarity in this context; readers of this paragraph may not have read, or remember, which definition you used 40 pages earlier.

An act, process, or instance of expanding. Ellipsis of expansion pack.

An act, process, or instance of expanding. An increase in the market value of an economy over time.

An act, process, or instance of expanding. Stretching of geometric objects with flat sides.

An act, process, or instance of expanding. The rewriting of an expression as a longer but equivalent sum of terms.