To give the different forms of a verb in an inflected language as they vary according to voice, mood, tense, number, and person. In Spanish class, we learned how to conjugate the verb 'hablar' in the present tense.
To join together, especially in marriage or a similar union. The priest will conjugate the couple in a traditional ceremony.
To undergo conjugation, a process in which two organisms exchange genetic material. Certain bacteria can conjugate to share antibiotic resistance genes.
To form the conjugate of a mathematical object, especially a complex number, matrix, or quaternion. To simplify the denominator, conjugate the complex number 5 − 2i.