the act of making or becoming a single unit; "the union of opposing factions"; "he looked forward to the unification of his family for the holidays"1つの構成単位を作ること、または1つの構成単位になること連盟
the act of pairing a male and female for reproductive purposes; "the casual couplings of adolescents"; "the mating of some species occurs only in the spring"生殖のために男女をつがわせる行為種付け