Search Dictionary
Definition of seaweed
seaweed
/ˈsiːwiːd/
sea · weed
Plural:seaweeds
seaweed Lexical Profile
CEFR
A2
Grade
4
Tier
1
Usage
Top 5k
seaweed Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• noun
1
Large, macroscopic marine algae that grow in the ocean or on rocks below the high-water mark, typically classified into red, brown, and green varieties.
Example
"After the heavy storm, the shoreline was littered with tangled masses of seaweed."
2
Edible marine algae used extensively in coastal cuisines, commonly processed into sheets or dried for use in dishes like sushi, soups, and salads.
Example
"The chef wrapped the seasoned rice and fresh tuna tightly in a crisp sheet of dried seaweed."
Synonyms
View all synonyms for seaweedWord Origin & Etymology
From Middle English 'see weed', a direct compound of 'sea' and 'weed', originally referring to any marine plant growing in the ocean, reflecting its abundance and appearance resembling terrestrial weeds.
Usage Trend
Historical frequency of usage in published text.
180019102020
Data source: Google Books Ngram Viewer
Cite this Entry
Wordmom. (2026). Definition of Seaweed. In Wordmom Dictionary. Retrieved Oct 14, 2026, from https://wordmom.com/dictionary/seaweed