·noun Space through which anything is expanded; also, pure space.
II. Expansion ·noun The act of expanding or spreading out; the condition of being expanded; dilation; enlargement.
III. Expansion ·noun The developed result of an indicated operation; as, the expansion of (a + b)2 is a2 + 2ab + b2.
IV. Expansion ·noun Enlargement or extension of business transactions; ·esp., increase of the circulation of bank notes.
V. Expansion ·noun That which is expanded; expanse; extend surface; as, the expansion of a sheet or of a lake; the expansion was formed of metal.
VI. Expansion ·noun The enlargement of the ship mathematically from a model or drawing to the full or building size, in the process of construction.
VII. Expansion ·noun 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.