English counterbore meaning in English  •  counterbore का अर्थ अंग्रेजी में

Noun

• A flat-bottomed cylindrical enlargement of the mouth of a hole, usually of slight depth, as for receiving a cylindrical screw head.
• 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.

v. t.

• To form a counterbore in, by boring, turning, or drilling; to enlarge, as a hole, by means of a counterbore.