Definition of Acid in English :

Define Acid in English

Acid meaning in English

Meaning of Acid in English

Pronunciation of Acid in English

Acid pronunciation in English

Pronounce Acid in English


see synonyms of acid


1. acid

any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt


3. acerb, acerbic, acid, acrid, bitter, blistering, caustic, sulfurous, sulphurous, virulent, vitriolic

harsh or corrosive in tone

Example Sentences:
'an acerbic tone piercing otherwise flowery prose'
'a barrage of acid comments'
'her acrid remarks make her many enemies'
'bitter words'
'blistering criticism'
'caustic jokes about political assassination, talk-show hosts and medical ethics'
'a sulfurous denunciation'
'a vitriolic critique'

4. acid, acidic, acidulent, acidulous

being sour to the taste

5. acid

having the characteristics of an acid

Example Sentences:
'an acid reaction'

WordNet Lexical Database for English. Princeton University. 2010.


see synonyms of acid
any substance that dissociates in water to yield a sour corrosive solution containing hydrogen ions, having a pH of less than 7, and turning litmus red
See also Lewis acid
a sour-tasting substance
3.  a slang name for LSD
4. chemistry
of, derived from, or containing acid
an acid radical
being or having the properties of an acid
sodium bicarbonate is an acid salt
sharp or sour in taste
cutting, sharp, or hurtful in speech, manner, etc; vitriolic; caustic
(of rain, snow, etc) containing pollutant acids in solution
(of igneous rocks) having a silica content of more than 60% of the total and containing at least one tenth quartz
9. metallurgy
of or made by a process in which the furnace or converter is lined with an acid material
acid steel

Collins English Dictionary. Copyright © HarperCollins Publishers


see synonyms of acid
sharp and biting to the taste; sour; tart
sharp or sarcastic in temperament or speech
that is, or has the properties of, an acid
having too heavy a concentration of acid
a sour substance
6.  Slang
7.  Chemistry
any compound that can react with a base to form a salt, the hydrogen of the acid being replaced by a positive ion; in modern theory, any substance that produces a positive ion and accepts electrons from a base to form covalent bonds: in water solution an acid tastes sour, turns blue litmus paper red, and, in the dissociation theory, produces free hydrogen ions
see also pH

Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved.


see synonyms of acid
1. Chemistry
a. Any of a class of substances whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals to form salts.
b. A substance that yields hydrogen ions when dissolved in water.
c. A substance that can act as a proton donor.
d. A substance that can accept a pair of electrons to form a covalent bond.
2. A substance having a sour taste.
3. The quality of being sarcastic, bitter, or scornful: wrote with acid about her first marriage.
4. Slang See LSD1.
1. Chemistry
a. Of, relating to, or containing an acid.
b. Having a high concentration of acid.
c. Having the characteristics of an acid.
a. Having a pH of less than 7.
b. Having a relatively high concentration of hydrogen ions.
3. Geology Containing a large proportion of silica: acid rocks.
4. Having a sour taste. See Synonyms at sour.
5. Biting, sarcastic, or scornful: an acid wit; an acid tone of voice.

The American Heritage ® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.