countersink

verb

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coun·ter·sink | \ ˈkau̇n-tər-ˌsiŋk

countersunk\ ˈkau̇n-tər-ˌsəŋk

\; countersinking

Definition of countersink

(Entry 1 of 2)

transitive verb

1 : to make a countersink on (a hole)

2 : to set the head of (something, such as a screw) at or below the surface

countersink

noun

Definition of countersink (Entry 2 of 2)

1 : a bit or drill for making a funnel-shaped enlargement at the outer end of a drilled hole

2 : the enlargement made by a countersink

Examples of countersink in a Sentence

Recent Examples on the Web: Verb With the drill press and a 5/32-inch-diameter bit, bore and countersink pilot holes in each block. — Neal Barrett, Popular Mechanics, 14 Nov. 2020 Attach legs: Hold each rear leg in place and countersink two evenly spaced holes through the seat slat and into the top of the leg. — Ted Kilcommons, Popular Mechanics, 18 July 2020 Lay out the holes first and drill and countersink them. — Popular Science, 9 Aug. 2020 Now, assemble per the photo and countersink the screws. 💡When decorating, avoid a high-gloss paint or finish, which is so slick the bags will slide off the board. — Popular Mechanics Editors, Popular Mechanics, 11 Apr. 2020 Recent Examples on the Web: Noun Drill two evenly spaced holes through the joint with a 3⁄8-inch countersink bit, and fasten with 1-inch screws. — Ted Kilcommons, Popular Mechanics, 18 July 2020 If screw heads sit slightly above the surface, remove, countersink, and screw back in. — The Editors Of House Beautiful, House Beautiful, 11 Feb. 2015

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'countersink.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.