To treat or use improperly; apply to an improper purpose; make a false or improper use of.To use or treat badly; abuse or maltreat in act or speech.Synonyms Abuse, Misuse. See abuse.n. Improper use; misapplication; employment in a wrong way or to a bad purpose; perversion.n. Abuse; ill treatment.n. Synonyms Perversion, profanation, prostitution. See abuse, v. t.