Dictionary.com
Thesaurus.com

knapweed

American  
[nap-weed] / ˈnæpˌwid /

noun

  1. any composite plant of the genus Centaurea, especially the weedy C. nigra, having rose-purple flowers set on a dark-colored, knoblike bract.


knapweed British  
/ ˈnæpˌwiːd /

noun

  1. any of several plants of the genus Centaurea, having purplish thistle-like flowers: family Asteraceae (composites) See also centaury hardheads

"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 knapweed

First recorded in 1400–50, knapweed is from the late Middle English word knopwed. See knop, weed 1

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:

The site was home to scarce plants including pyramidal and bee orchids, and a rare colony of marbled white butterflies that had relied on common knapweed and red fescue.

From BBC Aug. 8, 2026

Certain species such as cow parsley, yarrow and knapweed are in fact spreading, and he welcomes an influx of non-native plants and "garden escapes", such as snowdrop and buddleia.

From BBC Oct. 30, 2025

As far as I know, farmers are fine with knapweed.

From Seattle Times Jul. 2, 2022

Clover honey, most packers agree, is dependably tasty with broad appeal, but relatively pedestrian in contrast to the darker, more robust honeys such as gallberry, Chinese tallow, or spotted knapweed.

From Slate Sep. 10, 2014

She came down and skimmed over the tops of the knapweed and grasses to scare up the prey.

From "Frightful's Mountain" by Jean Craighead George

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training