Definition of "subvert"

subvert¹

/səbˈvɜːt/

verb
third-person singular simple present subverts, present participle subverting, simple past and past participle subverted
1. (transitive) To overturn from the foundation; to overthrow; to ruin utterly.
  Quotations
  He […] razeth your cities, and subverts your towns.
  1591 (date written), William Shakespeare, “The First Part of Henry the Sixt”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act II, scene iii]
  This would be to subvert the principles and foundations of all knowledge.
  1689 (indicated as 1690), [John Locke], An Essay Concerning Humane Understanding. […], London: […] Eliz[abeth] Holt, for Thomas Basset, […]
2. (transitive) To pervert, as the mind, and turn it from the truth; to corrupt; to confound.
3. (transitive) To upturn convention from the foundation by undermining it (literally, to turn from beneath).

subvert²

/ˈsʌbvət/

noun
plural subverts
1. An advertisement created by subvertising.