gaseous

adjective

gas·​eous ˈga-sē-əs  ˈga-shəs 

1

: having the form of or being gas

also : of or relating to gases

2

a

: lacking substance or solidity

b

: gassy sense 3

trick phrases and gaseous circumlocutions

—Edwin Newman

gaseousness noun

Synonyms

• bombastic
• flatulent
• fustian
• gassy
• grandiloquent
• oratorical
• orotund
• rhetorical
• rhetoric
• windy

Examples of gaseous in a Sentence

a substance changing from a liquid to a gaseous state

a pompous professor known for his gaseous lectures that often put students to sleep

Recent Examples on the Web

The advantage of liquid hydrogen over its gaseous form is in storage. —Joe Salas, New Atlas, 14 Jan. 2025

For 2023, there was a significant change to the car, now fueled by liquid hydrogen, not gaseous. —Jonathan M. Gitlin, Ars Technica, 5 June 2024

The air is a boiling mass of gaseous soup, distorting and dispersing light coming from the cosmos (this phenomenon is why stars twinkle). —Phil Plait, Scientific American, 23 Nov. 2023

Everything seems to come alive at once, opening a hole in the floor that emits a weird, gaseous black… something. —Nick Caruso, TVLine, 11 Jan. 2025

Word History

First Known Use

1799, in the meaning defined at sense 1

Kids Definition

gaseous

adjective

gas·​eous ˈgas-ē-əs 

ˈgash-əs

1

: having the form of or being gas

2

: of or relating to gas

3

: lacking solidity

Medical Definition

gaseous

adjective

gas·​eous ˈgas-ē-əs  ˈgash-əs 

: having the form of or being gas

also : of or relating to gases