bor·​er | \ ˈbȯr-ər How to pronounce borer (audio) \

Definition of borer

1 : a tool used for boring
2a : shipworm
b : an insect that bores in the woody parts of plants

Examples of borer in a Sentence

Recent Examples on the Web The larval-stage borer turns into an adult beetle that can fly to another tree to lay eggs. Beth Botts,, 22 Aug. 2021 First week: If necessary, second spray for peach tree borer and/or peach twig borer. oregonlive, 3 Aug. 2021 July 10-15: Spray peach and prune trees for peach tree borer and peach twig borer, as necessary. oregonlive, 1 July 2021 There is generally no need to treat trees for petiole borer. Paul Cappiello, The Courier-Journal, 18 May 2021 Petiole borer can hit maples, hickories, coffee trees, ash and, sometimes, oaks among a few others. Paul Cappiello, The Courier-Journal, 18 May 2021 Bronze birch borer have definitely become a problem in Oregon. oregonlive, 13 June 2021 Recent research found that common hunting wasps can control the fall army worm that attacks maize crops in Brazil, as well as a borer moth that eats sugarcane. Damian Carrington, Wired, 8 May 2021 The borer, likely introduced to Michigan in the ’90s from east Asia, is a glossy green beetle that rears its larvae in the inner bark of ash trees. Philip Kiefer, Popular Science, 25 Feb. 2021

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

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First Known Use of borer

14th century, in the meaning defined at sense 1

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The first known use of borer was in the 14th century

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Dictionary Entries Near borer

bore meal



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Cite this Entry

“Borer.” Dictionary, Merriam-Webster, Accessed 8 Dec. 2021.

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More Definitions for borer



English Language Learners Definition of borer

: an insect that digs holes in the woody parts of plants


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