v. phr. 1. To make good use of. The cat took advantage of the high grass to creep up on the bird. Jean took advantage of the lunch hour to finish her homework. 2. To treat (someone) unfairly for your own gain or help; make unfair use of. He took advantage of his friend's kindness. The little children did not know how much to pay for the candy, and Ralph took advantage of them.
Synonym: IMPOSE ON.