rehab

1. (informal) Rehabilitation, especially to treat the use of recreational drugs.Examples: "go into rehab"countableinformaluncountable

2. (informal) An institution for rehabilitation.Examples: "The assimilationists would have you believe that there is no lesbian or gay underclass, white or of color. That the junkies, crackheads and rummies in the drunk-tanks and welfare rehabs are all straight. Our addicts all have ample checkbooks, the best insurance their professions can buy, and membership in the right upscale cliques."countableinformaluncountable

3. (firefighting) A brief period of time spent away from the fire by a firefighter at a fire scene, for purposes of recuperation.countableuncountable