Definitions
1.nounOne of an array of compartments for housing pigeons.
2.nounOne of an array of compartments for receiving mail and other messages at a college, office, etc."Fred was disappointed to find his pigeonhole empty except for bills and a flyer offering 20% off on manicures."
3.nounOne of an array of compartments for storing scrolls at a library.
4.nounA similar compartment in a desk, used for sorting and storing papers.
5.verbTo categorize; especially to limit or be limited to a particular category, role, etc."Fred was tired of being pigeonholed as a computer geek."
6.verbTo put aside, to not act on (proposals, suggestions, advice).