1 : to bring (someone or something) back to a normal, healthy condition after an illness, injury, drug problem, etc.

[+ object]

The clinic rehabilitates drug addicts.

He’s still rehabilitating the knee he injured last summer.

They try to rehabilitate horses that have suffered injuries.

[no object]

She’s still rehabilitating  [=recovering ]  from her ankle injury.

2 [+ object] : to teach (a criminal in prison) to live a normal and productive life

The program is intended to rehabilitate criminals.

3 [+ object] : to bring (someone or something) back to a good condition : RESTORE

The country has rehabilitated its image since the war.

The city plans to rehabilitate its slum areas.