fitter
n. countablen. a person whose job is to put together or repair parts of a machine or equipment. You might see them working in a factory or on a construction site.
n. a skilled worker who installs, assembles, or repairs machinery and mechanical equipment. Often used in industrial or technical contexts to describe a specific trade.
The fitter is coming to fix the heating system.
The factory hired an experienced fitter to ensure the new assembly line was installed correctly.
After the initial design phase, the mechanical fitter spent weeks adjusting the custom components to ensure the turbine operated at peak efficiency.
From fit (verb) + -er.
From fit (adjective) + -er.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Often paired with a specific industry, such as 'pipe fitter' or 'gas fitter'.
Last updated May 11, 2026