The state of being a member of a group or organization. / The body of members of an organization. / (mathematics) The fact of being a member of a set.

plural of membership

(mathematics) A generalization of the indicator function for a fuzzy set which assigns a truth value (0 or 1) to each element.

(marketing) The process of acquiring, engaging, upgrading, and renewing members for an association or relationship-driven organization.

plural of membership function

A small card issued to and held by a member of a club, society or other organisation, verifying the member's membership for a given period.

plural of membership card

plural of e-membership

electronic membership