noun

• (obsolete) A delusion; an imposture; misrepresentation; deception.
  "Or is it some abuse, and no such thing?"
• (now rare) Catachresis.

verb

• (transitive) To put to a wrong use; to misapply; to use improperly; to use for a wrong purpose or end; to pervert
  "He abused his authority."
• (transitive) To injure; to maltreat; to hurt; to treat with cruelty, especially repeatedly.
  "And I would have things to say to this God at the judgement, storming at him, as Job stormed with the eloquence of the abused heart."
• (transitive) To attack with coarse language; to insult; to revile; malign; to speak in an offensive manner to or about someone; to disparage.
  "The […] tellers of news abused the general."
• (transitive) To imbibe a drug for a purpose other than it was intended; to intentionally take more of a drug than was prescribed for recreational reasons; to take illegal drugs habitually.