Alternative spelling of pigeonhole

(mathematics) The theorem which states that any partition of a finite set of n elements into m (< n) subsets (allowing empty subsets) must include a subset with two or more elements; any of certain reformulations concerning the partition of infinite sets where the cardinality of the unpartitioned set exceeds that of the partition (so there is no one-to-one correspondence).

Any of several fruit-eating doves or pigeons.

The edible tuber of Conopodium majus, native to western Europe. / (US) Any of various types of hickory or their fruits; a hognut. / Simmondsia chinensis, jojoba.

(biochemistry) Any of several bilins derived from porphyrin that are found in bile; principally bilirubin and biliverdin.

A flying target, usually a disc, made of a mixture of pitch and pulverized limestone rock, used as moving target in sport shooting.

(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.

A message sent by carrier pigeon.

plural of pigeonhawk

plural of pigeongram