To place or set forth so as to be seen or known; lay open to view; lay bare; uncover; reveal: as, to expose a thing to the light; to expose a secret.To place on view; exhibit; show: as, to expose goods for sale.To present to the action or influence of something: as, in photography, to expose a sensitized plate to the action of the actinic rays of light.To place or leave in an unprotected place or state; specifically, to abandon to chance in an open or unprotected place: as, among the ancient Greeks it was not uncommon for parents to expose their children.To place in the way, as of something which it would be better to avoid; subject, as to some risk; make liable: as, vanity exposes a person to ridicule; the movement exposed him to the danger of a raking fire in his flanks.To make known the actions or character of; reveal the secret or secrets of; lay open to comment, ridicule, reprehension, or the like, by some revelation: as, to expose a hypocrite or a rogue; to expose an impostor.To expound, as a theory.