2. Sunk into a chamfer; as, a countersunk bolt.

3. Beveled on the lower side, so as to fit a chamfered countersink; as, a countersunk nailhead.

COUNTERSWAY
Coun"ter*sway` (-sw`), n.

Defn: A swaying in a contrary direction; an opposing influence.
[Obs.]
A countersway of restraint, curbing their wild exorbitance. Milton.

COUNTER TENOR Coun"ter ten`or (tn`r). Etym: [OF. contreteneur. Cf. Contratenor, and see Tenor a part in music.] (Mus.)

Defn: One of the middle parts in music, between the tenor and the treble; high tenor. Counter-tenor clef (Mus.), the C clef when placed on the third line; — also called alto clef.

COUNTERTERM
Coun"ter*term` (-trm`), n.

Defn: A term or word which is the opposite of, or antithesis to, another; an antonym; — the opposite of synonym; as, "foe" is the counterterm of "friend". C. J. Smith.

COUNTERTIME
Coun"ter*time` (-tm`), n.

1. (Man.)