Definify.com
Webster 1913 Edition
Pigeonhole
Pi′geon-holeˊ
,Noun.
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.
Burke.
Pi′geon-holeˊ
,Verb.
T.
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