Meaning of SOUR in English

SOUR

/ ˈsaʊə(r); NAmE / adjective , verb

■ adjective

1.

having a taste like that of a lemon or of fruit that is not ready to eat :

sour apples

a sour flavour

OPP sweet

—see also sweet-and-sour ➡ note at bitter

2.

( especially of milk ) having an unpleasant taste or smell because it is not fresh :

to turn / go sour

➡ note at bitter

3.

( of people ) not cheerful; bad-tempered and unpleasant :

a sour and disillusioned woman

a sour face

The meeting ended on a sour note with several people walking out.

►  sour·ly adverb :

'Who asked you?' he said sourly.

►  sour·ness noun [ U ]

IDIOMS

- go / turn sour

- sour grapes

■ verb

1.

( of relationships, attitudes, people, etc. ) to change so that they become less pleasant or friendly than before; to make sth do this :

[ v ]

The atmosphere at the house soured.

[ vn ]

The disagreement over trade tariffs has soured relations between the two countries.

2.

[ v , vn ] if milk sours or if sth sours it, it becomes sour and has an unpleasant taste or smell

••

WORD ORIGIN

Old English sūr , of Germanic origin; related to Dutch zuur and German sauer .

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.