♦♦♦memberships1) N-UNCOUNT: also N in pl Membership of an organization is the state of being a member of it.
...his membership of the Communist Party...
He sent me a membership form...
Membership in her church youth group helped develop her political ideas.2) N-VAR-COLL The membership of an organization is the people who belong to it, or the number of people who belong to it.
The European Builders Confederation has a membership of over 350,000 building companies.
...organizations with huge memberships.
...the recent fall in party membership.
English dictionary. 2008.