bra·chyl·o·gy (br?-k?l??-j?)n. pl. bra·chyl·o·gies 1. Brevity of speech; conciseness.2. A shortened or condensed phrase or expression.[Medieval Latin brachylogia, from Greek brakhulogi? : brakhu-, brachy- + logos, speech; see -logy.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.brachylogy (bræ?k?l?d??) n, pl -gies1. a concise style in speech or writing2. (Grammar) a colloquial shortened form of expression that is not the result of a regular grammatical process: the omission of “good” in the expression “Afternoon” is a brachylogy. bra?chylogous adjCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014brachylogythe practice of conciseness in speech or writing.See also: Brevity-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.