Definitions for acidˈæs ɪd

This page provides all possible meanings and translations of the word acid

Random House Webster's College Dictionary

ac•idˈæs ɪd(n.)

  1. a compound usu. having a sour taste and capable of neutralizing alkalis and turning blue litmus paper red, containing hydrogen that can be replaced by a metal or an electropositive group to form a salt, or containing an atom that can accept a pair of electrons from a base.

    Category: Chemistry

  2. a substance with a sour taste.

  3. biting criticism or sarcasm.

  4. Slang. the drug LSD.

    Category: Status (usage)

  5. (adj.)belonging or pertaining to acids or the anhydrides of acids. having only a part of the hydrogen of an acid replaced by a metal or its equivalent: having a pH value of less than 7.

    an acid phosphate.

    Category: Chemistry

    Ref: Compare alkaline.

  6. characterized by a high concentration of acid.

  7. sharp or biting to the taste; sour:

    acid fruits.

  8. sharp, biting, or ill-natured in mood or manner; caustic:

    acid wit.

  9. vividly intense in color:

    acid green.

  10. (of igneous rock) rich in silica.

    Category: Geology

Origin of acid:

1620–30; < L acidus sour, akin to ācer sharp, acētum vinegar, acicula


Princeton's WordNet

  1. acid(noun)

    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

  2. acid, back breaker, battery-acid, dose, dot, Elvis, loony toons, Lucy in the sky with diamonds, pane, superman, window pane, Zen(adj)

    street name for lysergic acid diethylamide

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

    harsh or corrosive in tone

    "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. acidic, acid, acidulent, acidulous(adj)

    being sour to the taste

  5. acid(adj)

    having the characteristics of an acid

    "an acid reaction"

Kernerman English Learner's Dictionary

  1. acid(noun)ˈæs ɪd

    a liquid substance that can burn things


  1. acid(Noun)

    A sour substance.

  2. acid(Noun)

    Any of several classes of compound having the following properties:-

  3. acid(Noun)

    lysergic acid diethylamide

  4. acid(Adjective)

    Sour, sharp, or biting to the taste; tart; having the taste of vinegar.

    acid fruits or liquors

  5. acid(Adjective)


  6. acid(Adjective)

    Of or pertaining to an acid; acidic.

  7. acid(Adjective)

    Denoting a musical genre that is a distortion (as if hallucinogenic) of an existing genre, as in acid house, acid jazz, acid rock.

  8. Origin: From acide, from acidus, from aceo.

Webster Dictionary

  1. Acid(adj)

    sour, sharp, or biting to the taste; tart; having the taste of vinegar: as, acid fruits or liquors. Also fig.: Sour-tempered

  2. Acid(adj)

    of or pertaining to an acid; as, acid reaction

  3. Acid(noun)

    a sour substance

  4. Acid(noun)

    one of a class of compounds, generally but not always distinguished by their sour taste, solubility in water, and reddening of vegetable blue or violet colors. They are also characterized by the power of destroying the distinctive properties of alkalies or bases, combining with them to form salts, at the same time losing their own peculiar properties. They all contain hydrogen, united with a more negative element or radical, either alone, or more generally with oxygen, and take their names from this negative element or radical. Those which contain no oxygen are sometimes called hydracids in distinction from the others which are called oxygen acids or oxacids


  1. Acid

    An acid is a substance which reacts with a base. Commonly, acids can be identified as tasting sour, reacting with metals such as calcium, and reacting with bases such as sodium carbonate. Aqueous acids have a pH under 7. Solutions with higher acidity have lower pH. Chemicals or substances having the property of an acid are said to be acidic. Common examples of acids include acetic acid, sulfuric acid, hydrochloric acid and tartaric acid. As these examples show, acids can be solutions or pure substances, and can be derived from solids, liquids, or gases. Strong acids and some concentrated weak acids are corrosive, but there are exceptions such as carboranes and boric acid. There are three common definitions for acids: the Arrhenius definition, the Brønsted-Lowry definition, and the Lewis definition. The Arrhenius definition defines acids as substances which increase the concentration of hydronium ions in solution. The Brønsted-Lowry definition is an expansion: an acid is a substance which can act as a proton donor, while a base acts as a proton acceptor. By this definition, any compound which can easily be deprotonated can be considered an acid. Examples include alcohols and amines which contain O-H or N-H fragments. Lewis acids are electron-pair acceptors, while Lewis bases donate an electron-pair. Examples of Lewis acids include all metal cations, and electron-deficient molecules such as boron trifluoride and aluminium trichloride.

British National Corpus

  1. Spoken Corpus Frequency

    Rank popularity for the word 'acid' in Spoken Corpus Frequency: #2156

  2. Written Corpus Frequency

    Rank popularity for the word 'acid' in Written Corpus Frequency: #1978

  3. Nouns Frequency

    Rank popularity for the word 'acid' in Nouns Frequency: #783

Anagrams of acid

  1. cadi

  2. caid

Translations for acid

Kernerman English Multilingual Dictionary


(of taste) sharp or sour

Lemons and limes are acid fruits.

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