Trim'mer, n.

n. 1. One who trims, arranges, fits, or ornaments.

2. One who fluctuates between parties, so as to appear to favor either; a time-server.
3. (Arch.) A small beam, into which are framed the ends of several joists, as when a hole is to be left for stairs, or to avoid bringing joists near chimneys, and the like. Gwill.