acid Meaning & Definition
What Does Acid Mean?
Acid is an adjective that means Sour, sharp, or biting to the taste; tart; having the taste of vinegar. It is also used to mean Sour-tempered. As a noun, it means A sour substance.
Acid: Key Facts
| Part of speech | adjective, noun |
|---|---|
| Pronunciation | /ˈæsɪd/ |
| Synonyms | acerbic, caustic and virulent |
| Antonyms | alkaline, base and alkali |
| Plural | acids |
| Comparative / superlative | acider, acidest |
Acid Definition (Adjective)
- Sour, sharp, or biting to the taste; tart; having the taste of vinegar.
acid fruits or liquors
- Sour-tempered.
His response was harsh and acid.
- Of or pertaining to an acid; acidic.
acid soils
- Denoting a musical genre that is a distortion (as if hallucinogenic) of an existing genre, as in acid house, acid jazz, acid rock.
Acid as a Noun
- A sour substance.
- (chemistry) Any compound which yields H+ ions (protons) when dissolved in water; an Arrhenius acid. Any compound that easily donates protons to a base; a Brønsted acid. Any compound that can accept a pair of electrons to form a covalent bond; a Lewis acid.
- Any compound which yields H+ ions (protons) when dissolved in water; an Arrhenius acid.
- Any compound that easily donates protons to a base; a Brønsted acid.
- Any compound that can accept a pair of electrons to form a covalent bond; a Lewis acid.
- Any corrosive substance.
- LSD, lysergic acid diethylamide.
Synonyms of Acid
Antonyms of Acid
Acid in a Sentence
acid fruits or liquors
His response was harsh and acid.
acid soils
Word Forms & Grammar
acid (comparative acider, superlative acidest)
acid (countable and uncountable, plural acids)
Words That Rhyme With Acid
Origin of Acid
From French acide, from Latin acidus (“sour, acid”), from aceō (“to be sour”). Doublet of agita.
Common Questions About Acid
Is acid an adjective or a noun?
Acid is mainly used as an adjective, but it can also be used as a noun.
What is another word for acid?
Close synonyms of acid are acerbic, caustic and virulent. See the full list of acid synonyms and antonyms.
What is the plural of acid?
The plural of acid is acids.
What are the comparative and superlative forms of acid?
The comparative form is acider and the superlative form is acidest.