Definition of expands:
(v) :
(transitive) To increase the extent, number, volume or scope of (something).
(v) :
(transitive) To change (something) from a smaller form or size to a larger one; to spread out or lay open.
(v) :
(intransitive) To change or grow from smaller to larger in form, number, or size.
(v) :
(intransitive) To increase in extent, number, volume or scope.
(v) :
(transitive) To express (something) at length and/or in detail.
(v) :
(intransitive) To speak or write at length or in detail.