EXPANSION definition and meaning | Collins English Dictionary Expansion is the part of an engine cycle in which the fluid increases in volume and makes a part such as a piston or flywheel move The expansion of the gas pushes the piston inside the cylinder The expansion of the gas causes the piston to move
expansion - WordReference. com Dictionary of English The runway is undergoing expansion to allow bigger planes to land there [countable] an expanded portion or form of a thing: The book is an expansion of a series of articles
expansion noun - Definition, pictures, pronunciation and usage notes . . . an act of increasing or making something increase in size, amount or importance Despite the recession the company is confident of further expansion The expansion of higher education will continue The book is an expansion of a series of lectures given last year