Breadcrumb Home > Dictionary > Index T trimmer arch: Meaning and Definition of Find definitions for: trim'mer arch" Pronunciation: [key] — Building Trades. Building Trades. an arch, usually of brick and in the form of half of a segmental arch, between a chimney and a header in a floor structure to support a hearth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. trimmer trimming TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: spurious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language