Definition of "antidote"

antidote

/ˈæn.tɪ.doʊt/

noun
plural antidotes
1. A remedy to counteract the effects of poison.
  Quotations
  Can'ſt thou not Miniſter to a minde diſeas'd, / Plucke from the Memory a rooted Sorrow, / Raze out the written troubles of the Braine, / And with ſome ſweet Obliuious Antidote / Cleanſe the ſtufft boſome, of that perillous ſtuffe / Which weighes vpon the heart?
  c. 1606 (date written), William Shakespeare, “The Tragedie of Macbeth”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act V, scene iii], page 149, column 2
  The druids […] believed that mistletoe could make barren animals fecund, and that it was an antidote to all poisons.
  2014 December 23, Olivia Judson, “The hemiparasite season”, in The New York Times‎
2. (figurative) Something that counteracts or prevents something harmful.
verb
third-person singular simple present antidotes, present participle antidoting, simple past and past participle antidoted
1. (transitive) To counteract as an antidote.
  Quotations
  For his part, the patient must avoid some commonplace substances in order to avoid antidoting or stopping the action of the homeopathic remedy […]
  2007, Suzanne C. Lawton, Judyth Reichenberg-Ullman, Asperger syndrome: natural steps toward a better life, page 143