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Synonyms

weedkiller

British  
/ ˈwiːdˌkɪlə /

noun

  1. a substance, usually a chemical or hormone, used for killing weeds

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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.

Bayer stock slumped on Wednesday as the German giant set a preliminary accord to cap litigation over its weedkiller Roundup.

From MarketWatch • Feb. 18, 2026

The International Agency for Research on Cancer considers glyphosate, one of Roundup's ingredients, a probable human carcinogen, but Bayer says scientific studies and regulatory approvals show the weedkiller is safe.

From Barron's • Feb. 17, 2026

Plaintiffs’ lawyers have argued that Bayer should have included a warning label on its Roundup weedkiller products about potential cancer risks.

From The Wall Street Journal • Jan. 16, 2026

Bayer says scientific studies and regulatory approvals show that the weedkiller is safe.

From Barron's • Nov. 12, 2025

California lawmakers have approved a bill that could help strengthen regulations around the use of paraquat, a powerful weedkiller associated with Parkinson’s disease and other serious health issues.

From Los Angeles Times • Aug. 31, 2024

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.