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Definition of vastness
vastness
/ˈvæst.nəs/
vast · ness
Adverb:vastly
•Plural:vastnesses
•Adjective:vast
vastness Lexical Profile
CEFR
B2
Grade
7
Tier
2
Usage
Top 10k
Syllables
2
vastness Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• noun
1
The quality or state of being immense, boundless, or of very great size, extent, or degree.
Example
"The sheer vastness of the observable universe continues to astonish modern astronomers."
2
An immense, open, and seemingly limitless space or expanse.
Example
"Early explorers crossed the frozen vastness of the Arctic tundra in search of a northern sea route."
Synonyms
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View all antonyms for vastness• Rhymes for vastness
Word Origin & Etymology
Formed in the late 16th century from the adjective 'vast' (from Latin 'vastus', meaning immense, extensive, or desolate) combined with the Old English native suffix '-ness'.
Cite this Entry
Wordmom. (2026). Definition of Vastness. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/vastness