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
call attention to; "Please don't advertise the fact that he has AIDS"
make publicity for; try to sell (a product); "The salesman is aggressively pushing the new computer model"; "The company is heavily advertizing their new laptops"