WordNet sense 1 (a national legislative assembly):

congress

WordNet sense 2 (the legislature of the United States government):

US Congress, U.S. Congress, United States Congress

WordNet sense 3 (the act of sexual procreation between a man and a woman; the man's penis is inserted into the woman's vagina and excited until orgasm and ejaculation occur):

coitus, relation, coition, sexual intercourse, carnal knowledge, sex act, sexual congress, sexual relation