Simple past tense and past participle of pigeonhole.(verb)
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Use "pigeonholed" in a sentence
"I think he always felt kind of pigeonholed in the banker category."
"Maybe they don't like being "pigeonholed" and react badly to any suggestion that there's a model into which they can placed; maybe they're just so practical that they can't abide any theory at all; maybe they just enjoy sticking a knife into the creative work of others."
"March 2, 2003, edition, a National Public Radio commentator on language named Geoffrey Nunberg was lamenting in an op-ed piece that liberals had been "pigeonholed" by conservatives."