Flush bolt. (a) A screw bolt whose head is countersunk, so as to be
flush with a surface. (b) A sliding bolt let into the face or edge of a
door, so as to be flush therewith. -- Flush deck. (Naut.) See under
Deck, n., 1. -- Flush tank, a water tank which can be emptied rapidly
for flushing drainpipes, etc.
Flush (?), adv. So as to be level or even.
Flush"board` (?), n. Same as Flashboard.
Flush"er (?), n. 1. A workman employed in cleaning sewers by flushing
them with water.