1

sour

play
adjective \ˈsau̇(-ə)r\

Definition of sour

  1. 1 :  causing or characterized by the one of the four basic taste sensations that is produced chiefly by acids sour pickles — compare bitter, salt, sweet

  2. 2a (1) :  having the acid taste or smell of or as if of fermentation :  turned sour milk (2) :  of or relating to fermentationb :  smelling or tasting of decay :  rancid, rotten sour breathc (1) :  bad, wrong a project gone sour (2) :  hostile, disenchanted went sour on Marxism

  3. 3a :  unpleasant, distastefulb :  cross, sullenc :  not up to the usual, expected, or standard quality or pitch

  4. 4 :  acid in reaction —used especially of soil

  5. 5 :  containing malodorous sulfur compounds —used especially of petroleum products

sourish

play \ˈsau̇(-ə)r-ish\ adjective

sourly

adverb

sourness

noun

Examples of sour in a Sentence

  1. The milk had turned sour.

  2. He made a sour face.

Recent Examples of sour from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sour'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of sour

Middle English, from Old English sūr; akin to Old High German sūr sour, Lithuanian sūrus salty


2

sour

noun

Definition of sour

  1. 1a :  something sourb :  the primary taste sensation produced by acid stimuli

  2. 2 :  a cocktail consisting of a liquor (such as whiskey), lemon or lime juice, sugar, and sometimes ice

Recent Examples of sour from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sour'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of sour

before 12th century

Other Alcoholic Beverage Terms


3

sour

verb

Definition of sour

  1. intransitive verb
  2. :  to become sour

  3. transitive verb
  4. :  to make sour

Examples of sour in a Sentence

  1. Her disposition has soured in recent years.

  2. Jealousy has soured their relationship.

  3. His experiences have soured him.

  4. The team's victory was soured by an injury to one of their best players.

Recent Examples of sour from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sour'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of sour

14th century



SOUR Defined for English Language Learners

sour

play
adjective

Definition of sour for English Language Learners

  • : having an acid taste that is like the taste of a lemon

  • : having the unpleasant taste or smell of food that is no longer fresh

  • : unpleasant or unfriendly

sour

noun

Definition of sour for English Language Learners

  • : an alcoholic drink that has a sour taste

sour

verb

Definition of sour for English Language Learners

  • of food : to lose freshness and get an unpleasant taste or smell : to become sour

  • : to become unpleasant or unfriendly

  • : to make (someone or something) unpleasant or unfriendly


SOUR Defined for Kids

1

sour

play
adjective \ˈsau̇r\

Definition of sour for Students

sourer

;

sourest

  1. 1 :  having an acid or tart taste a sour fruit

  2. 2 :  having spoiled :  not fresh sour milk

  3. 3 :  suggesting decay a sour smell

  4. 4 :  not pleasant or friendly a sour look

sourly

adverb He looked at me sourly enough but said nothing. — Robert Louis Stevenson, Treasure Island

sourness

noun

2

sour

play
verb

Definition of sour for Students

soured

;

souring

  1. 1 :  to make or become acid or tart in taste (as by spoiling) The milk soured.

  2. 2 :  to lose or cause to lose interest or enthusiasm He soured on trying new stunts following the mishap.

  3. 3 :  to harm or damage The misunderstanding soured their friendship.


Medical Dictionary

1

sour

play
adjective \ˈsau̇(ə)r\

Medical Definition of sour

  1. :  causing, characterized by, or being the one of the four basic taste sensations that is produced chiefly by acids—compare bitter, salt 2, sweet

sourness

noun

2

sour

noun

Medical Definition of sour

  1. :  the primary taste sensation produced by acid stimuli



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