a spot that is open late at night and that provides entertainment (as singers or dancers) as well as dancing and food and drink; "don't expect a good meal at a cabaret"; "the gossip columnist got his information by visiting nightclubs every night"; "he played the drums at a jazz club"
a tentative theory about the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena; "a scientific hypothesis that survives experimental testing becomes a scientific theory"; "he proposed a fresh theory of alkalis that later was accepted in chemical practices"
a proposal intended to explain certain facts or observations