VALVE

Definition of VALVE

  1. (noun)a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
  2. (noun)device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
  3. (noun)control consisting of a mechanical device for controlling the flow of a fluid
  4. (noun)the entire one-piece shell of a snail and certain other molluscs
  5. (noun)one of the paired hinged shells of certain molluscs and of brachiopods