1. condense, lessen, limit, restrict. Shorten, abbreviate, abridge, curtail mean to make shorter or briefer. Shorten is a general word meaning to make less in extent or duration: to shorten a dress, a prisoner's sentence. The other three terms suggest methods of shortening. To abbreviate is to make shorter by omission or contraction: to abbreviate a word. To abridge is to reduce in length or size by condensing, summarizing, and the like: to abridge a document. Curtail suggests deprivation and lack of completeness because of omitting some part: to curtail an explanation. 5. contract, lessen.