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Definition of johnsongrass

johnsongrass

/ˈdʒɑːnsənˌɡræs/
john · son · grass
Plural:johnsongrasses
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johnsongrass Lexical Profile

johnsongrass Game Scores & Validity

• 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 johnsongrass

Word Nuance & Usage

Frequently written as two words and capitalized ('Johnson grass'), as it is named after a specific historical figure.

• Nearby Words

johnny jump up
johnnycake
johnson
johnsongrass
join
joinable
joiner

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.

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Johnsongrass. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/johnsongrass
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