How to Use poisonous in a Sentence

poisonous

adjective
  • Chocolate is poisonous to dogs.
  • This species of spider is extremely poisonous.
  • This stuff has to be poisonous.
    — Kansas City Star, 18 Sep. 2025
  • The noise can be poisonous to your morale and your state of mind.
    — Dave Knox, Forbes, 20 June 2022
  • An herbalist who had a way with poisonous plants.
    — Literary Hub, 5 Jan. 2026
  • The nuts are poisonous and should not be consumed.
    — Nasha Smith, PEOPLE, 1 Jan. 2026
  • Mushrooms do grow in the wild, many of which may be poisonous.
    — Ashley Martens, Women's Health, 16 Feb. 2023
  • Then his heart beat its last, and the poisonous moth embraced him.
    — Ingrid Vasquez, People.com, 24 July 2025
  • There are a lot of look-alikes out there, some poisonous or toxic.
    — Krista Simmons, Sunset Magazine, 10 Sep. 2022
  • Hydrangeas are poisonous to dogs and cats.
    — Sophia Beams, Better Homes & Gardens, 2 May 2026
  • No doubt one of them will bring home a plant that’s poisonous for felines.
    — Molly Aitken, New Yorker, 1 Feb. 2026
  • Both fruit and tuber are poisonous.
    — Joshua Siskin, Oc Register, 16 Apr. 2026
  • How poisonous is a black widow?
    — Tiffany Acosta, AZCentral.com, 6 Oct. 2025
  • Mistletoe plants are poisonous as well.
    — Matt Kasson, Popular Science, 17 Dec. 2025
  • Like, say, if the rain is poisonous, wouldn't there be a lack of potable water?
    — Rebecca Farley, refinery29.com, 7 May 2018
  • The city was swiftly engulfed by a black cloud of hot poisonous gas.
    — Nathaniel Rich, The New York Review of Books, 25 May 2022
  • And now there's such a theory as fruits from a poisonous tree.
    — NBC News, 15 Apr. 2018
  • This is a way to reject the poisonous stories that move through the air.
    — Claire Comstock-Gay, The Cut, 19 Mar. 2018
  • Some Cubans are afraid of the snails, calling them poisonous.
    — Tracey Eaton, USA TODAY, 7 Mar. 2018
  • The whisky was slightly poisonous.
    — Aj Willingham, AJC.com, 6 Apr. 2026
  • Yes, hemlock plants are poisonous.
    — Markis Hill, Kansas City Star, 28 Mar. 2026
  • And what former camp kid can’t spout off a rhyme about which snakes are poisonous and which are safe?
    — Mary Shannon Wells, Southern Living, 11 July 2024
  • The baits are poisonous and can pose a hazard to children, pets and wildlife.
    — Michael Harrelson, sandiegouniontribune.com, 12 Apr. 2018
  • And there were giant spiders that were poisonous and stuff on the edge of the trees.
    — Nick Romano, EW.com, 18 Dec. 2024
  • The zoo said Cara is not poisonous and didn't pose a threat to the public.
    — NBC News, 8 July 2021
  • And, just a reminder, these snakes are venomous, not poisonous.
    — Dennis Pillion | [email protected], al, 1 Aug. 2022
  • For boys who find themselves on teams with such a poisonous culture, sports are not a refuge.
    — Emma Brown, Washington Post, 22 Feb. 2021
  • Every part of the pong pong tree is poisonous, but the leaves and barks aren’t as potent as the seeds.
    — Angela Haupt, Time, 7 Apr. 2025
  • Explain to them that the plant is very invasive and poisonous to some wildlife.
    — Amy Dickinson, Washington Post, 28 Apr. 2023
  • The fruits and seeds produced by the female plant are also poisonous.
    — San Diego Union-Tribune, 14 Nov. 2020

Some of these examples are programmatically compiled from various online sources to illustrate current usage of the word 'poisonous.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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