What is qualify? What is qualify? To describe by enumerating the characteristics or qualities of; characterize.To make competent or eligible for an office, position, or task.To declare competent or capable; certify. To make legally capable; license.To modify, limit, or restrict, as by giving exceptions.To make less harsh or severe; moderate. See Synonyms at moderate.Grammar To modify the meaning of (a noun, for example).To be or become qualified.To reach the later stages of a selection process or contest by competing successfully in earlier rounds.