Definition of "copulate"
copulate
/ˈkɒp.jʊ.leɪt/
verb
third-person singular simple present copulates, present participle copulating, simple past and past participle copulated
(somewhat formal) To engage in sexual intercourse.
adjective
not comparable
(obsolete) Joined; associated; coupled.
(grammar) Joining subject and predicate; copulative.