Nonmember

Non`mem´ber

One who is not a member; as, nonmembers are not allowed in the club reading room.

Noun

nonmember - a person who is not a member

Antonyms:

member - one of the persons who compose a social group (especially individuals who have joined and participates in a group organization); "only members will be admitted"; "a member of the faculty"; "she was introduced to all the members of his family"

human, individual, member, mortal, person, somebody, someone, soul