A small compartment in a desk or case for the keeping of letters, documents, etc.; -- so called from the resemblance of a row of them to the compartments in a dovecote.
source: Webster 1913
verb
place into a small compartment
source: WordNet 3.0
treat or classify according to a mental stereotype
I was stereotyped as a lazy Southern European.
source: WordNet 3.0
To place in the pigeonhole of a case or cabinet; hence, to put away; to lay aside indefinitely; as, to pigeonhole a letter or a report.
