v. t. - To render larger, more extended, or more intense, and the like; -- used especially of telescopes, microscopes, etc.
v. t. - To enlarge by addition or discussion; to treat copiously by adding particulars, illustrations, etc.; to expand; to make much of.
v. i. - To become larger.
v. i. - To speak largely or copiously; to be diffuse in argument or description; to dilate; to expatiate; -- often with on or upon.