Definition of "vinegar"

vinegar

/ˈvɪnəɡə/

noun
countable and uncountable, plural vinegars
1. (uncountable) A sour liquid formed by the fermentation of alcohol used as a condiment or preservative; a dilute solution of acetic acid.
2. (countable) Any variety of vinegar.
3. (derogatory, uncommon) A black Vietnamese person.
verb
third-person singular simple present vinegars, present participle vinegaring, simple past and past participle vinegared
1. (transitive) To season or otherwise treat with vinegar.
  Quotations
  Accordingly, after a vast amount of moaning and crying up-stairs, and much damping of foreheads, and vinegaring of temples, and hartshorning of noses, and so forth […]
  1841 February–November, Charles Dickens, “Barnaby Rudge”, in Master Humphrey’s Clock, volume III, London: Chapman & Hall, […], chapter 19