From Longman Dictionary of Contemporary Englishrehabre‧hab /ˈriːhæb/ noun [uncountable] MDDthe process of curing someone who has an alcohol or drugs problem a rehab programin rehab I spent three months in rehab.
Examples from the Corpus
rehab• a rehab center• In announcing Monday that he had entered rehab, Kasteler did not disclose the nature of his illness.• Gerald Drug-induced, I hear-I believe she's actually in rehab as we speak.• He will be fine after a few months in rehab.• He made it back last season after a year of rehab and approached his pre-injury level throughout most of the tumultuous season.in rehab• I spent seven months in rehab.Origin rehab (1900-2000) rehabilitation 