Fitting into or onto a corresponding part, as a matched plug and socket.

(zoology) Pairing of organisms for copulation. / (zoology) Sexual union; copulation.

present participle of mate

plural of mating, gerund of mate.

simple past tense and past participle of mate

fitted together or interlocked

(chess) Clipping of checkmate.

(chess) Clipping of checkmate.

A fellow, comrade, colleague, partner or someone with whom something is shared, e.g. shipmate, classmate. / (especially of a non-human animal) A breeding partner.

(intransitive) To match, fit together without space between. / (intransitive) To copulate. / (intransitive) To pair in order to raise offspring. / (transitive) To arrange in matched pairs.