Definify.com

Webster 1913 Edition


Counterbore

Coun′ter-boreˊ

(-b?rˊ)
,
Noun.
1.
A flat-bottomed cylindrical enlargement of the mouth of a hole, usually of slight depth, as for receiving a cylindrical screw head.
2.
A kind of pin drill with the cutting edge or edges normal to the axis; – used for enlarging a hole, or for forming a flat-bottomed recess at its mouth.

Counˊter-bore′

(kounˊt?r-b?r′)
,
Verb.
T.
To form a counterbore in, by boring, turning, or drilling; to enlarge, as a hole, by means of a counterbore.

Definition 2024


counterbore

counterbore

English

A counterbore in a piece of metal.

Noun

counterbore (plural counterbores)

  1. A cylindrical recess, typically machined around a hole to admit a **** so that it sits flush with a surface.
  2. The tool with which a counterbore is machined.

Translations

Verb

counterbore (third-person singular simple present counterbores, present participle counterboring, simple past and past participle counterbored)

  1. (transitive) To create such a cylindrical recess.

See also