A co-option (also cooptation, co-optation, cooption) is an election in which members of a committee (or similar group) vote in order to fill a vacancy on that committee or group.
A co-option (also cooptation, co-optation, cooption) is an act of absorbing or assimilating. The term may refer to an election in which members of a committee (or similar group) vote in order to fill a vacancy on that committee or group.