Definition of trimmer

• n. - One who trims, arranges, fits, or ornaments.
• n. - One who does not adopt extreme opinions in politics, or the like; one who fluctuates between parties, so as to appear to favor each; a timeserver.
• n. - An instrument with which trimming is done.
• n. - A beam, into which are framed the ends of headers in floor framing, as when a hole is to be left for stairs, or to avoid bringing joists near chimneys, and the like. See Illust. of Header.