B2noun1K

Acid

UK /["/ˈæsɪd/"]/US /["/ˈæsɪd/"]/

Definition

a chemical, usually a liquid, that contains hydrogen and has a pH of less than seven. The hydrogen can be replaced by a metal to form a salt. Acids usually have a bitter sharp taste and can often burn holes in or damage things they touch.

In simple words: A sour liquid that can burn or eat away other materials.

Examples

  • The acid burned a hole in her coat.
  • Stomach acids can break down the poison.
  • You will need a special chemical to neutralize the acid.
  • They smoke joints and drop acid.
  • He described the music as ‘Brahms on acid’.

Usage notes

Used in scientific contexts, particularly in chemistry. Can refer to acidic solutions or substances. Not commonly used in casual conversations unless discussing food or health.

Grammar pattern

standalone noun

Memory hint

Think of 'acid' as 'a-sid'—like something that makes you pucker up!

Collocations

  • concentrated
  • strong
  • dilute
  • produce
  • neutralize
  • burn something
  • break something down
  • drop
  • on acid

Synonyms

  • LSD

Antonyms

  • alkaline
  • basic

Common mistakes

  • Confused with 'acidity' which refers to the quality of being acid.
  • Using 'acid' to describe something very bitter.
  • Mispronouncing it as 'acidde' instead of 'a-sid'.