ma ‧ chin ‧ ist /məˈʃiːnəst, məˈʃiːnɪst/ BrE AmE noun [countable]
[ Word Family: noun : ↑ machine , ↑ machinery , ↑ machinist , ↑ mechanic , mechanics, ↑ mechanism , ↑ mechanization ; adjective : ↑ mechanical , ↑ mechanized , ↑ mechanistic ; verb : ↑ machine , ↑ mechanize ; adverb : ↑ mechanically , ↑ mechanistically ]
someone who operates a machine, especially in a factory:
All the women are highly skilled machinists.