·p.p. & ·adj Chamfered at the top;
— said of a hole.
II. Countersunk ·Impf & ·p.p. of Countersink.
III. Countersunk ·p.p. & ·adj Sunk into a chamfer; as, a countersunk bolt.
IV. Countersunk ·p.p. & ·adj Beveled on the lower side, so as to fit a chamfered countersink; as, a countersunk nailhead.