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Definition of gaseous

gaseous

/ˈɡæsiəs/
gas · e · ous
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gaseous Lexical Profile

gaseous Game Scores & Validity

• adjective

1

Relating to, existing as, or having the characteristics of a gas rather than a solid or liquid.

Example

"Jupiter is a massive gaseous planet composed primarily of hydrogen and helium."

2

Lacking substance or solidity; tenuous, empty, or overly wordy.

Example

"The critic dismissed the politician's speech as a series of gaseous promises with no practical plan."

Synonyms
View all synonyms for gaseous
Antonyms
View all antonyms for gaseous

Word Nuance & Usage

'Gaseous' is the standard scientific adjective meaning 'in the form of a gas,' whereas 'gassy' is an informal word meaning 'containing excess gas' (such as a carbonated drink or a bloated stomach).

• Rhymes for gaseous

• Nearby Words

gas plant
gasbag
gascoyne
gaseous
gasfield
gasfitter
gash

Word Origin & Etymology

Formed in the late 18th century from the noun 'gas'—coined in the 17th century by Flemish chemist Jan Baptist van Helmont from Ancient Greek 'khaos' (chaos, empty space)—combined with the suffix '-eous'.

Cite this Entry

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