acid

noun6

1. •
   a chemical that tastes sour, often eats away what it touches, and gives hydrogen to water
2. •
   Any compound that easily donates protons to a base; a Brønsted acid.
3. •
   Any compound that can accept a pair of electrons to form a covalent bond; a Lewis acid.
4. •
   Any corrosive substance.
5. •
   (slang) LSD, lysergic acid diethylamide.

   • In the end, though, there is one sure way to distinguish a real hippie from his assorted sympathizers: hippies drop acid. That is, real hippies frequently, if irregularly, ingest LSD. — 1967
6. •
   A sour substance.

adjective4

1. •
   Sour, sharp, or biting to the taste; tart; having the taste of vinegar.

   • acid fruits or liquors
2. •
   Of or pertaining to an acid; acidic.

   • acid soils
3. •
   (figurative) Sour-tempered.

   • His response was harsh and acid.
4. •
   Denoting a musical genre that is a distortion (as if hallucinogenic) of an existing genre, as in acid house, acid jazz, acid rock.

noun1

1. •
   Acronym of atomicity, consistency, isolation, and durability, a set of properties that guarantee database transactions are processed reliably.

   • SQLite relies on native file locking and page journaling to implement ACID properties. — 2007