Meaning of acid In English

• 0 any of various usually liquid substances that can react with and sometimes dissolve other materials:

  • acetic/hydrochloric/lactic acid

  • Vinegar is an acid.

• 1 slang for LSD (= an illegal drug that makes people see things that do not exist)

• 2 containing acid, or having similar qualities to an acid:

  • an acid taste/smell

  • acid soil

• 3 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.

• 4 any of various chemical substances that can produce salts, some of which are able to damage whatever they touch

• 5 sour in taste:

  • The salad dressing has an acid taste.