a person or thing that trims.

a tool or machine for trimming, clipping, paring, or pruning.

a machine for trimming lumber.

Building Trades .

a joist or rafter supporting one of the ends of a header at the edge of a wellhole.

a wall tile or floor tile for finishing an edge or angle.

an apparatus for stowing, arranging, or shifting cargo, coal, or the like.

a person who has no firm position, opinion, or policy, esp. in politics.

a person who is committed to no particular political party, adapting to one side or another as expediency may dictate.