#1 Union n. [union, labor union, trade union, trades union, brotherhood] an organization of employees formed to bargain with the employer; "you have to join the union in order to get a job". wn
#2 Union n. [North] the United States (especially the northern states during the American Civil War); "he has visited every state in the Union"; "Lee hoped to detach Maryland from the Union"; "the North's superior resources turned the scale". wn
#3 Union n. [coupling, mating, pairing, conjugation, union, sexual union] 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". wn
#4 Union a. [union] of trade unions; "the union movement"; "union negotiations"; "a union-shop clause in the contract". wn
#5 Union n. [union, unification] the state of being joined or united or linked; "there is strength in union". wn
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