simple past tense and past participle of pigeonhole

One of an array of compartments for housing pigeons. / (by extension) One of an array of compartments for receiving mail and other messages at a college, office, etc.

To categorize; especially to limit or be limited to a particular category, role, etc. / To put aside, to not act on (proposals, suggestions, advice).

present participle of pigeonhole

the classification of disparate entities into categories, not always for the right reason

plural of pigeonhole / The game of nineholes.

Third-person singular simple present indicative form of pigeonhole

plural of pigeonholing

Able to be pigeonholed; able to be categorised.

plural of pigeonholer