In grammar:
* To change the form of a verb to show tense, person, number, and mood. For example, the verb "to walk" can be conjugated into "walk," "walks," "walked," "walking," etc.
In mathematics:
* To find the complex conjugate of a number. The complex conjugate of a complex number is found by changing the sign of the imaginary part. For example, the conjugate of 3 + 4i is 3 - 4i.
In other contexts:
* To join or combine together. For example, "The two companies conjugated to form a larger enterprise."
* To reproduce sexually. For example, "The bacteria conjugated to exchange genetic material."
The specific meaning of "conjugate" will be determined by the context in which it is used.