adjective
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of or relating to bile
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affected with or denoting any disorder related to excess secretion of bile
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informal (esp of colours) extremely distasteful; nauseating
a bilious green
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informal bad-tempered; irritable
Other Word Forms
Etymology
Origin of bilious
First recorded in 1535–45; from Latin bīliōsus; see origin at bile, -ous
Explanation
If an unpleasant meal has left you feeling grumpy and looking green, you're bilious in several senses of the word. This adjective can mean both "troubled by indigestion" and "irritable," and it can also be used to suggest a sickly green shade. The wonderfully descriptive word bilious comes from the root bile, which is a foul green fluid made in the liver and stored in the gall bladder — a fact that helps us picture something described as bilious as being really foul. Because of the connection with bile, we often refer to something that's an ugly shade of green as being bilious. Of course, the word can also be more kindly applied to someone who has a liver or gall bladder disorder.
Vocabulary lists containing bilious
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Mr. McMullan is an effective antidote to the more bilious goings on—the acting is much more flamboyant in the Atticus story than in Susan’s, which is less entertaining than distracting.
From The Wall Street Journal ● Sep. 3, 2026
Color is a bilious miasma, golden tones sliding into flashes of brightness that collapse into queasy hues.
From Los Angeles Times ● Oct. 20, 2023
Washed in an unappetizing sludge of grayish green, the movie aims for serious and settles on bilious.
From New York Times ● Mar. 16, 2023
But her rhetoric can be just as bilious, if not more so.
From Washington Post ● Sep. 27, 2022
“A bilious complaint is caused by bile,” she says, eyes closed, thinking aloud.
From "The Bletchley Riddle" by Ruta Sepetys and Steve Sheinkin
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
