acid Meaning in the Cambridge English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of “acid” in the English Dictionary

"acid" in British English

See all translations

acidnoun

uk   us   /ˈæs.ɪd/

acid noun (CHEMICAL)

B2 [C or U] any of ​various usually ​liquidsubstances that can ​react with and sometimes ​dissolve other ​materials: acetic/hydrochloric/​lactic acid Vinegar is an acid.
More examples

acid noun (DRUG)

[U] slang for LSD (= an ​illegaldrug that makes ​peoplesee things that do not ​exist)

acidadjective

uk   us   /ˈæs.ɪd/

acid adjective (CHEMICAL)

(also acidic) containing acid, or having ​similarqualities to an acid: an acid ​taste/​smell acid ​soil

acid adjective (UNKIND)

used to ​describe a ​remark or way of ​speaking that is ​cruel or ​criticizes something in an ​unkind way: her acid ​wit When she ​spoke her ​tone was acid.
(Definition of acid from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"acid" in American English

See all translations

acidnoun [C/U]

 us   /ˈæs·ɪd/
chemistry any of ​variouschemicalsubstances that can ​produce salts , some of which are ​able to ​damage whatever they ​touch

acidadjective

 us   /ˈæs·ɪd/
sour in ​taste: The ​saladdressing has an acid ​taste. fig. An acid ​comment/​remark is something said or written in ​strongcriticism.
(Definition of acid from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of acid?
Add Cambridge dictionaries to your browser to your website
Word of the Day

golden

made of gold

Word of the Day

Introducing a new author and a new weekly blog post!
Introducing a new author and a new weekly blog post!
by Cambridge Dictionaries Online,
August 27, 2015
The English language is constantly changing. You know that. But did you know that at Cambridge Dictionaries Online we keep track of the changes? We continually add new words and new meanings to our online dictionary for learners of English. Some of them are new to English entirely (neologisms), and some

Read More 

parklet noun
parklet noun
August 31, 2015
a public outdoor space that may be associated with a local business but where anyone can sit Pop-up cafes in NY are what’s actually called parklets in many other places around the country.

Read More