Definition of "rehab"

rehab

/ˈɹiːhæb/

noun
countable and uncountable, plural rehabs
1. (informal) Rehabilitation, especially to treat the use of recreational drugs.
2. (informal) An institution for rehabilitation.
  Quotations
  They tried to make me go to rehab, I said, 'no, no, no.'
  2006, Amy Winehouse (lyrics and music), “Rehab”, in Back to Black
verb
third-person singular simple present rehabs, present participle rehabbing, simple past and past participle rehabbed
1. (informal, transitive) To rehabilitate.