Definition of: expand

(ik·spand′) v.t.
1. To increase the range, scope, volume, size, etc., of: to expand a business.
2. To spread out by unfolding or extending; open: The peacock expands his tail.
3. To write or develop in full the details or form of, as a thought, argument, etc.
—v.i.
4. To grow larger, wider, etc.; unfold; increase. See synonyms under AMPLIFY, SPREAD. [<L expandere <ex- out + pandere spread. Doublet of SPAWN.]
—ex·pand′er noun