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Definition of johnsongrass
johnsongrass
/ˈdʒɑːnsənˌɡræs/
john · son · grass
Plural:johnsongrasses
johnsongrass Lexical Profile
CEFR
C1
Grade
10
Tier
3
Usage
Rare
johnsongrass Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• noun
1
A tall, vigorously growing perennial grass (Sorghum halepense) native to the Mediterranean region, originally introduced to the Americas as a forage crop but now widely classified as a noxious, highly invasive weed due to its resilient rhizome system.
Example
"The farmers deployed targeted herbicides to prevent the johnsongrass from overtaking their newly planted corn fields."
Synonyms
View all synonyms for johnsongrassWord Nuance & Usage
Frequently written as two words and capitalized ('Johnson grass'), as it is named after a specific historical figure.
• Nearby Words
Word Origin & Etymology
Named after Colonel William Johnson, who sowed the grass on his river-bottom farm in Alabama in the 1840s, popularizing it as a forage crop before its invasive nature was understood.
Cite this Entry
Wordmom. (2026). Definition of Johnsongrass. In Wordmom Dictionary. Retrieved Oct 15, 2026, from https://wordmom.com/dictionary/johnsongrass