Simple past tense and past participle of pigeon-hole.(verb)
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Use "pigeon-holed" in a sentence
"Perhaps it's a good thing that you can't and won't be pigeon-holed!"
"The real danger is that people can become pigeon-holed and assigned rolls based on such esoteric concepts as that of the unchangeable "g.""
"Republican Senator Charles Grassley was reported to have pigeon-holed the Occupy Des Moines activists as "A lot of unemployed young people looking for some dates.""