say it: TRIM-ur
trimmer is a noun meaning "a worker who thins out and trims trees and shrubs". It carries 4 recorded senses.
a machine that trims timber
capacitor having variable capacitance; used for making fine adjustments
joist that receives the end of a header in floor or roof framing in order to leave an opening for a staircase or chimney etc.
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for trimmer come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.