- 1 [uncountable] membership (in something) the state of being a member of a group, a club, an organization, etc. Who is eligible to apply for membership in the association? a membership card/fee
- 2 [countable] the members of, or the number of members in, a group, a club, an organization, etc. The membership has not yet voted. The club has a membership of more than 500.
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