acid
Proposed by a contributor, not yet supported by evidence.
Also seen as: acider · acidest · acids
Sense 1
Sour, sharp, or biting to the taste; tart; having the taste of vinegar.
Adjective
Examples
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 2
Sour-tempered.
Adjective
Examples
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 3
A sour substance.
Noun
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 4
Any compound which yields H+ ions (protons) when dissolved in water; an Arrhenius acid.
Bất kỳ hợp chất nào giải phóng ion H+ khi hòa tan trong nước
Machine-translated — suggest a fix
Noun
Examples
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “acid” mean?
Sour, sharp, or biting to the taste; tart; having the taste of vinegar.
Is “acid” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.