countersink
Americanverb (used with object)
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to enlarge the upper part of (a cavity), especially by chamfering, to receive the cone-shaped head of a screw, bolt, etc.
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to cause (the head of a screw, bolt, etc.) to sink into a prepared depression so as to be flush with or below the surface.
noun
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a tool for countersinking a hole.
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a countersunk hole.
verb
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to enlarge the upper part of (a hole) in timber, metal, etc, so that the head of a bolt or screw can be sunk below the surface
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to drive (a screw) or sink (a bolt) into such an enlarged hole
noun
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Also called: countersink bit. a tool for countersinking
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a countersunk depression or hole
Other Word Forms
Conjugated Forms
Present
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have countersunkperfect
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has countersunkperfect 3rd person singular
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am countersinkingprogressive 1st person singular
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countersinkssingular 3rd person
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is countersinkingprogressive 3rd person singular
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have been countersinkingperfect progressive
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has been countersinkingperfect progressive 3rd person singular
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are countersinkingprogressive
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countersinkingparticiple
Past
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had countersunkperfect
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were countersinkingprogressive plural
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countersunkparticiple
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was countersinkingprogressive singular
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had been countersinkingperfect progressive
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countersanksimple
Future
Etymology
Origin of countersink
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Countersink the heads of the screws so they will not be in the way of the hands when the vise is used.
From The Boy Mechanic: Volume 1 700 Things for Boys to Do by Popular Mechanics Co.
Countersink for the heads on the back of the shield and so fasten the antlers in place.
From Home Taxidermy for Pleasure and Profit A Guide for Those Who Wish to Prepare and Mount Animals, Birds, Fish, Reptiles, etc., for Home, Den, or Office Decoration by Farnham, Albert B.
Countersink the top of the hole so that the full diameter of the countersink will be 1-1/4 in.
From The Boy Mechanic: Volume 1 700 Things for Boys to Do by Popular Mechanics Co.
Countersink this hole enough to allow the head to sink flush with the surface.
From Handwork in Wood by Noyes, William
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
