sour
adjective
having an acid taste, resembling that of vinegar, lemon juice, etc.; tart.
sour
American
[souuhr, sou-er]
/ saʊər, ˈsaʊ ər /
adjective
sourer,
sourest
-
having an acid taste, resembling that of vinegar, lemon juice, etc.; tart.
- Antonyms:
- sweet
-
rendered acid or affected by fermentation; fermented.
-
producing the one of the four basic taste sensations that is not bitter, salt, or sweet.
-
characteristic of something fermented.
a sour smell.
-
distasteful or disagreeable; unpleasant.
- Synonyms:
- unsatisfactory, subpar, suboptimal, bitter
-
below standard; poor.
It was a sour effort all around, the kind of effort that doesn't exactly inspire confidence.
-
harsh in spirit or temper; acrimonious; disagreeable; peevish.
-
Agriculture. (of soil) having excessive acidity.
-
(of gasoline or the like) contaminated by sulfur compounds.
-
Music. off-pitch; badly produced.
a sour note.
noun
-
something that is sour.
-
any of various cocktails consisting typically of whiskey or gin with lemon or lime juice and sugar and sometimes soda water, often garnished with a slice of orange, a maraschino cherry, or both.
-
any of various beers with a particularly acidic or tart taste, made so by acid-producing bacteria and yeast in the brew.
Sours are a good choice to go with deep-fried bar food.
-
an acid or an acidic substance used in laundering and bleaching to neutralize alkalis and to decompose residual soap or bleach.
verb (used without object)
-
sours,
present (3rd person singular)
-
soured,
past participle, past
-
souring
present participle
-
to become sour, rancid, mildewed, etc.; spoil.
Milk sours quickly in warm weather. The laundry soured before it was ironed.
-
to become unpleasant or strained; worsen; deteriorate.
Relations between the two countries have soured.
-
to become bitter, disillusioned, or disinterested.
I guess I soured when I learned he was married.
My loyalty soured after his last book.
-
Agriculture. (of soil) to develop excessive acidity.
verb (used with object)
-
sours,
present (3rd person singular)
-
soured,
past participle, past
-
souring
present participle
-
to make sour; cause sourness in.
What do they use to sour the mash?
-
to cause spoilage in; rot.
Defective cartons soured the apples.
-
to make bitter, disillusioned, or disagreeable.
One misadventure needn't have soured him. That swindle soured a great many potential investors.
sour
1
British
/ ˈsaʊə /
adjective
-
having or denoting a sharp biting taste like that of lemon juice or vinegar Compare bitter
-
made acid or bad, as in the case of milk or alcohol, by the action of microorganisms
-
having a rancid or unwholesome smell
-
(of a person's temperament) sullen, morose, or disagreeable
-
(esp of the weather or climate) harsh and unpleasant
-
disagreeable; distasteful
a sour experience
-
(of land, etc) lacking in fertility, esp due to excessive acidity
-
(of oil, gas, or petrol) containing a relatively large amount of sulphur compounds
-
to become unfavourable or inharmonious
his marriage went sour
noun
-
something sour
-
any of several iced drinks usually made with spirits, lemon juice, and ice
a whiskey sour
-
an acid used in laundering and bleaching clothes or in curing animal skins
verb
Sour
2
British
/ sʊə /
noun
Other Word Forms
Derived Forms
-
oversournessnoun
-
sournessnoun
-
unsournessnoun
-
oversouradjective
-
sourishadjective
-
unsouradjective
-
oversourlyadverb
-
sourlyadverb
-
unsourlyadverb
Inflected Forms
Participles
Conjugated Forms
Present
-
soursimple
-
sourssimple
-
have souredperfect
-
has souredperfect
-
am souringprogressive
-
are souringprogressive
-
is souringprogressive
-
have been souringperfect progressive
-
has been souringperfect progressive
Past
-
souredsimple
-
had souredperfect
-
was souringprogressive
-
were souringprogressive
-
had been souringperfect progressive
Future
Etymology
Origin of sour
First recorded before 1000; Middle English adjective and noun sure, soure, Old English adjective sūr; cognate with German sauer, Dutch zuur, Old Norse sūrr
Explanation
If something is sour, it has a tangy or sharp flavor, like a lemon. Your brother may love the taste of limes, while they're way too sour for you. Sometimes this adjective is used to describe a fermented odor (the way milk smells when it goes bad), or a wrong note in music, or even a terrible mood: "Mom was acting so sour that I didn't even ask her if we could have pizza for dinner." Sour comes from the Old English sur, "sour, tart, or fermented."
Vocabulary lists containing sour
"The Sun Rising" by John Donne
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odes
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Part 2 Vocabulary (Unit 3)
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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.
See Examples For:
Pringles, Burger King all went with ultra-minimal redesigns, as if anyone would see Pringles as a forward-thinking tech company and not the perfect contraption to get sour cream–and–onion dust all over your hands.
From Slate ● Aug. 21, 2026
Here, they get cooked with butter, brown sugar, orange zest and salt until glossy and jammy, then folded into a simple sour cream cake scented generously with cardamom.
From Salon ● Aug. 16, 2026
But that bet went sour as their value has fallen by around $10,000.
From BBC ● Aug. 13, 2026
I’m referring to how our moods sour as summer comes to an end and coffee chains promote the gourd-flavored beverages.
From MarketWatch ● Aug. 13, 2026
Nhamo thought longingly of the cool, sour taste of the fermented mealie-water.
From "A Girl Named Disaster" by Nancy Farmer
I plunked down at a gaming station and embarrassed myself playing “Mario Kart” over a lunch of Diet Coke and Ruffles Cheddar and Sour Cream chips.
From The Wall Street Journal ● Jun. 10, 2026
For Phillips Distilling, the impact of the provincial liquor boycott was felt almost immediately due to the popularity Sour Puss in Canada.
From BBC ● May 28, 2026
I ask if Sour Patch Kids are gluten-free, and I get a warning about additives in the ingredient list.
From Slate ● May 6, 2026
Sour cream and cheese to add tang; pinto beans and red salsa for heartiness.
From Los Angeles Times ● Feb. 19, 2026
Grunt had no tongue and Sour Alyn had no wits, Lord Ramsay liked to say.
From "A Dance with Dragons" by George R. R. Martin
For the rest of us, however, inflation may leave a sourer taste.
From BBC ● Aug. 23, 2022
But in two self-portraits, featuring the artist cradling an old-time painter’s palette, you also sense a sourer side.
From New York Times ● Oct. 28, 2021
Compared with punchier, sourer, more cynical sitcoms—from All in the Family to Seinfeld to The Office—that found humor in humanity’s bad behavior, Friends was smiley and conflict-averse to the point of being featherweight.
From Slate ● Sep. 21, 2014
Now three decades old, the unused vacuum cleaners still bristle with the glory of newness, though the sculpture's beatification of consumer commodities tastes even sourer in our more ecologically minded age.
From The Guardian ● Jun. 25, 2014
It was quite otherwise with Hepzibah; the Judge's smile seemed to operate on her acerbity of heart like sunshine upon vinegar, making it ten times sourer than ever.
From House of the Seven Gables by Nathaniel Hawthorne
It’s a return to innocence — a gustatory reminder of those carefree childhood moments when I indulged in the sourest of sour treats to my heart’s content.
From Salon ● Sep. 13, 2025
"Has that not just left the sourest taste in the mouth at the end of this international summer? I'm dumbfounded," said England all-rounder Georgia Elwiss on BBC Test Match Special.
From BBC ● Sep. 24, 2022
Filipino cooking is among the world’s brightest, sweetest, sourest, and funkiest of world cuisines; by comparison, almost any other food seems bland.
From The New Yorker ● Dec. 19, 2018
I predict no Seattle starter makes it to the fourth inning from here on in, that the offense wilts like a dying daisy, and that the M’s end their season on the sourest of notes.
From Seattle Times ● Sep. 21, 2017
“Whose lemons are the sourest and—and—juiciest ever grown.”
From Aunt Jane?s Nieces on the Ranch by L. Frank (Lyman Frank) Baum
Plus, Trump sours on his Homeland Security secretary, and celebrities get romantic with private-equity guys.
From The Wall Street Journal ● Aug. 8, 2026
What follows is a tale of tension, deception and a forbidden love that sours, reminiscent of Brontë novels.
From Los Angeles Times ● Jun. 24, 2026
Everything reasonable from the first half quickly sours.
From Slate ● Jun. 18, 2026
The clatter of cutlery as an atmosphere sours over dinner.
From BBC ● Apr. 24, 2026
Jayden’s phone rings and his whole expression sours.
From "Amari and the Night Brothers" by B.B. Alston
Situational Awareness, the hedge fund whose aggressive AI bets soured badly in July, is backed by a formidable lineup of Silicon Valley and Wall Street investors.
From The Wall Street Journal ● Aug. 9, 2026
It initially did well but then shut down after big bets soured.
From The Wall Street Journal ● Aug. 4, 2026
It first soured over a decade ago, during the tenure of athletic director Pat Haden.
From Los Angeles Times ● Jul. 23, 2026
The alliance has genuinely soured in recent months.
From Slate ● Jul. 23, 2026
That soured his first meeting with Oppenheimer, who was invited to the Oval Office on October 25, 1945, to discuss legislation for domestic control of the atom.
From "Big Science" by Michael Hiltzik
Samsung Electronics stock had its worst day in three weeks on Monday as investors reacted to its shareholder-return plan, souring the mood for other memory-chip making rivals.
From MarketWatch ● Aug. 24, 2026
Plus, why lawmakers are suddenly souring on megasize data centers, and Jon Ossoff’s 2028 audition.
From The Wall Street Journal ● Aug. 22, 2026
Buffett said his decision to no longer give to the Gates Foundation wasn’t based on a souring of his relationship with Gates, or revelations relating to Gates’s ties with Jeffrey Epstein.
From The Wall Street Journal ● Jul. 15, 2026
Each new alarm like this elicits anxieties and murmurs that souring private credit is about to become the new subprime mortgage crisis.
From Barron's ● May 30, 2026
On the other hand, because of their souring relationship, Megan had asked her mother not to come to her high school graduation.
From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel
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.
