trimmer n
1 (Also called)
trimmer joist a beam in a floor or roof structure attached to truncated joists in order to leave an opening for a staircase, chimney, etc.
2 a machine for trimming timber
3 (Also called)
trimming capacitor (Electronics) a variable capacitor of small capacitance used for making fine adjustments, etc.
4 a person who alters his opinions on the grounds of expediency
5 a person who fits out motor vehicles