cooptare Save DMLBS Antiquities 1 cooptare v. coaptare(5a) 2 cooptare [CL] , a to co-opt, appoint. b to incorporate. a 1533 (v. consessus 1c). b curavit per literas regias pagum suum a Finderne in baroniam burgum ‥ ~ari Ferr. Kinloss 40. COOPTARE COOPTA´RE[COLLEGIUM]