What is the meaning of misuse?

noun

• Improper or excessive use.
  • usage: "alcohol abuse"; "the abuse of public funds"
  • synonyms: abuse

verb

• Apply to a wrong thing or person; apply badly or incorrectly.
  • usage: "The words are misapplied in this context"; "You are misapplying the name of this religious group"
  • synonyms: misapply
• Change the inherent purpose or function of something.
  • usage: "Don't abuse the system"; "The director of the factory misused the funds intended for the health care of his workers"
  • synonyms: pervert, abuse