but
1 Americanconjunction
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on the contrary; yet.
My brother went, but I did not.
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She was so overcome with grief she could do nothing but weep.
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unless; if not; except that (followed by a clause, often with that expressed).
Nothing would do but that I should come in.
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without the circumstance that.
It never rains but it pours.
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otherwise than.
There is no hope but by prayer.
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that (used especially after doubt, deny, etc., with a negative).
I don't doubt but he will do it.
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who not; that not.
No leaders worthy of the name ever existed but they were optimists.
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(used as an intensifier to introduce an exclamatory expression).
But she's beautiful!
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Informal. than.
It no sooner started raining but it stopped.
preposition
adverb
noun
idioms
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but what. what.
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but for, except for; were it not for.
But for the excessive humidity, it might have been a pleasant day.
noun
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the outer or front room of a house; the outer or front apartment in an apartment house.
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the kitchen of a two-room dwelling, especially of a cottage.
noun
conjunction
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contrary to expectation
he cut his knee but didn't cry
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in contrast; on the contrary
I like opera but my husband doesn't
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(usually used after a negative) other than
we can't do anything but wait
conjunction
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(usually used after a negative) without it happening or being the case that
we never go out but it rains
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(foll by that) except that
nothing is impossible but that we live forever
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archaic if not; unless
preposition
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except; save
they saved all but one of the pigs
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were it not for
but for you, we couldn't have managed
adverb
-
just; merely; only
he was but a child
I can but try
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informal though; however
it's a rainy day: warm, but
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almost; practically
he was all but dead when we found him
noun
noun
preposition
Grammar
But, like and, is a common transitional word and often begins sentences. When it is used in the middle of a sentence as a coordinating conjunction like and or so, it is not followed by a comma unless the comma is one of a pair setting off a parenthetical expression: His political affiliations make no difference, but his lack of ethics does. The cast is nearly complete, but, our efforts notwithstanding, we lack a star. See also and, so 1. When but is understood as a conjunction and the pronoun following it is understood as the subject of an incompletely expressed clause, the pronoun is in the subjective case: Everyone lost faith in the plan but she ( did not lose faith ). In virtually identical contexts, when but is understood as a preposition, the pronoun following it is in the objective case: Everyone lost faith but her. The prepositional use is more common. However, when prepositional but and its following pronoun occur near the beginning of a sentence, the subjective case often appears: Everyone but she lost faith in the plan. See also doubt, than.
Usage
What are other ways to say but?
The conjunction but means “on the contrary,” and is used to indicate contrast or opposition between elements in a sentence. How is but different from however, nevertheless, still, and yet? Find out on Thesaurus.com.
Synonym Usage
See except 1.
Other Word Forms
Etymology
Origin of but1
First recorded before 900; Middle English buten, Old English būtan, contraction of be ūtan “on the outside, without”; see by ( def. ), out ( def. )
Origin of but2
First recorded in 1715–25; noun use of adverb but 1 ( def. ) “outside, outside the house”
Origin of but-4
Explanation
But is the word that turns a corner in a sentence. If a sentence starts out in one direction, but can change that direction. For example: "I like you, but I never want to see you again." But can mean "however," "nonetheless," and "on the contrary" in three little letters. It's English efficiency at its best. But is short but powerful. But is everywhere but never unnecessary. But sometimes means "just," as in "I'll have but a few of those delicious candies." Grade schoolers might snicker, but the word would need another t to mean your "bottom."
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.
The company said in a confidential filing statement that there were “things we want to do that are likely easier as a private company,” but declined to elaborate further.
From The Wall Street Journal • Jun. 11, 2026
The law was intended to protect children under 13 years old from being targeted by businesses operating online but was enacted in 2000.
From BBC • Jun. 11, 2026
He last won with Carolina in 2006, but he earned two President’s Trophies in 2017-18 and 2023-24 with the Predators and the Rangers.
From Los Angeles Times • Jun. 10, 2026
Into every life a little rain must fall - but nothing could prepare Olivia Rodrigo for Hampstead Heath in June.
From BBC • Jun. 10, 2026
They try to remain hopeful, but in May 1942 they receive devastating news: Corregidor, the island where General MacArthur had established his new headquarters, has been defeated.
From "At Last She Stood" by Erin Entrada Kelly
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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.