plural of pigeonhole / The game of nineholes.

simple past tense and past participle of pigeonhole

Third-person singular simple present indicative form of pigeonhole

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

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.

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

present participle of pigeonhole

(mineralogy) Any monoclinic pyroxene that is a mixed calcium, magnesium and ferrous silicate.

plural of pigeonite

(derogatory) An individual who has served in the military only during peacetime, or only in a non-combat capacity, but offers strategic advice and promote military actions.