To go before; be earlier than; anticipate; forestall.To take previous measures against; hence, to frustrate; disappoint; evade; escape.To hinder from action by the opposition of obstacles; impede; restrain; check; preclude: generally followed by from.To keep from existing or occurring; render impossible.Synonyms To preclude, bar, debar.To come beforehand; come before others, or before the usual time.To interpose a hindrance, especially an insurmountable obstacle; interpose an effectual check; hinder.