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

Maintenance could include the removal of dead and dying trees, in some cases killed by ash borers or damaged by oak wilt, Sustainability Director Mike Foley said. Courtney Astolfi,, "Cuyahoga County awards nearly $1 million to cities, civic groups in County Executive Budish’s tree canopy restoration plan," 11 Sep. 2019 Secondly, higher the tree diversity, the lesser the pest attacks from the berry borer beetle—this is likely because more beneficial insects such as those that eat the dangerous ones are able to thrive. Nandita Jayaraj, Quartz India, "The coffee plantations of India’s western ghats are being wrongly blamed for climate change," 4 Sep. 2019 There are birch tree varieties that are more and less susceptible to bronze birch borer., "Can household vinegar kill dandelions? Ask an expert," 17 Aug. 2019 The adult bronze borer is a ½-inch-long, dark, bronzed colored beetle., "Can household vinegar kill dandelions? Ask an expert," 17 Aug. 2019 Orange oil soaks into the bark and wood, kills the borers and sets up a repellent fragrance. Howard Garrett, Dallas News, "Is that tree damage from woodpeckers or borer insects?," 13 Aug. 2019 The borers, which came from Asia on a ship, lay eggs in ash tree bark. Alyssa Lukpat,, "Maine Forest Service releasing wasps to kill invasive forest beetles," 17 July 2019 At the beginning of the season, cover your plants with floating row covers to protect them from common culprits like squash bugs, squash vine borers, and cucumber beetles. Caroline Picard, Good Housekeeping, "How to Grow a Pumpkin Plant in Your Garden This Fall," 12 July 2019 If your summer squash is destroyed by squash vine borers, replace it with tatuma squash. Calvin Finch,, "More great plants for color in your San Antonio summer garden," 14 June 2019

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.

See More

First Known Use of borer

14th century, in the meaning defined at sense 1

Keep scrolling for more

Learn More about borer

Dictionary Entries near borer



bore meal





Statistics for borer

Last Updated

25 Sep 2019

Look-up Popularity

Time Traveler for borer

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

See more words from the same century

Keep scrolling for more

More Definitions for borer



English Language Learners Definition of borer

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

More from Merriam-Webster on borer

Rhyming Dictionary: Words that rhyme with borer

Comments on borer

What made you want to look up borer? Please tell us where you read or heard it (including the quote, if possible).


suitable to be imparted to the public

Get Word of the Day daily email!

Test Your Vocabulary

Where in the World? A Quiz

  • peter bruegel tower of babel painting
  • What language does pajama come from?
True or False

Test your knowledge - and maybe learn something along the way.

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!