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Canada thistle

American  

noun

  1. an Old World plant, Cirsium arvense, having small purple or white flower heads, now a troublesome weed in North America.


Canada thistle British  

noun

  1. the US and Canadian name for creeping thistle

"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

Etymology

Origin of Canada thistle

An Americanism dating back to 1790–1800

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.

See Examples For:

Today, 140 years later, Canada thistle is a Class C noxious weed in Washington.

From Seattle Times Jun. 11, 2022

Many look for nectar on dandelion, rabbitbrush, Canada thistle, osier dogwood and chokecherry.

From Seattle Times Aug. 27, 2021

They are targeting Johnson grass, giant foxtail, Canada thistle, nodding thistle, common teasel, multiflora rose, Amur honeysuckle, poison hemlock, marestail, Japanese knotweed and kudzu.

From Washington Times Mar. 18, 2021

The state’s contractor, Ed’s Plant World of Brandywine, is going after porcelain-berry, kudzu, Canada thistle and mile-a-minute weed, among other species.

From Washington Post Aug. 27, 2016

There are but four weeds that I know of—milkweed, live-forever, Canada thistle, and toad-flax—that it will not run out in a good soil.

From A Year in the Fields by Burroughs, John

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