"pigeonhole" in the noun sense
a specific (often simplistic) category
2. cubbyhole, pigeonhole
a small compartment
"pigeonhole" in the verb sense
place into a small compartment
2. pigeonhole, stereotype, stamp
treat or classify according to a mental stereotype
"I was stereotyped as a lazy Southern European"
Source: WordNet® (An amazing lexical database of English)
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