The act of conjugating. The state of being conjugated. Grammar The inflection of a particular verb. Grammar A presentation of the complete set of inflected forms of a verb. Grammar A class of verbs having similar inflected forms. Biology The temporary union of two bacterial cells during which one cell transfers part or all of its genome to the other. Biology A process of sexual reproduction in which ciliate protozoans of the same species temporarily couple and exchange genetic material. Biology A process of sexual reproduction in certain algae and fungi in which temporary or permanent fusion occurs, resulting in the union of the male and female gametes.