Source : Webster's Revised Unabridged Dictionary (1913)

Uncouple \Un*cou"ple\, v. t. [1st pref. un- + couple.]
   To loose, as dogs, from their couples; also, to set loose; to
   disconnect; to disjoin; as, to uncouple railroad cars.

Uncouple \Un*cou"ple\, v. i.
   To roam at liberty. [Obs.] --Chaucer.

Source : WordNet®

uncouple
     v : disconnect or separate; "uncouple the hounds" [syn: {decouple}]
         [ant: {couple}]