The Collaborative International Dictionary of English v.0.48:

Recuperate \Re*cu"per*ate\ (-?t), v. i. [imp. & p. p.
   Recuperated (-?`t?d); p. pr. & vb. n. Recuperating.] [L.
   recuperatus, p. p. of recuperare. See Recover to get
   again.]
   To recover health; to regain strength; to convalesce.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Recuperate \Re*cu"per*ate\, v. t.
   To recover; to regain; as, to recuperate the health or
   strength.
   [1913 Webster]

WordNet (r) 3.0 (2006):

recuperate
    v 1: regain or make up for; "recuperate one's losses" [syn:
         recover, recoup, recuperate]
    2: regain a former condition after a financial loss; "We expect
       the stocks to recover to $2.90"; "The company managed to
       recuperate" [syn: recover, go back, recuperate]
    3: restore to good health or strength
    4: get over an illness or shock; "The patient is recuperating"
       [syn: recuperate, recover, convalesce] [ant:
       degenerate, deteriorate, devolve, drop]