Abbreviate Ab*bre"vi*ate, v. t. [imp. & p. p. Abbreviated; p. pr. & vb. n. Abbreviating.] [L. abbreviatus, p. p. of abbreviare; ad + breviare to shorten, fr. brevis short. See Abridge.] 1. To make briefer; to shorten; to abridge; to reduce by contraction or omission, especially of words written or spoken. It is one thing to abbreviate by contracting, another by cutting off. --Bacon. 2. (Math.) To reduce to lower terms, as a fraction., Abbreviated Ab*bre"vi*a`ted, a. Shortened; relatively short; abbreviate.