The Collaborative International Dictionary of English v.0.48:

Aid \Aid\, v. t. [imp. & p. p. Aided; p. pr. & vb. n.
   Aiding.] [F. aider, OF. aidier, fr. L. adjutare to help,
   freq. of adjuvare to help; ad + juvare to help. Cf.
   Adjutant.]
   To support, either by furnishing strength or means in
   co["o]peration to effect a purpose, or to prevent or to
   remove evil; to help; to assist.
   [1913 Webster]

         You speedy helpers . . .
         Appear and aid me in this enterprise.    --Shak.
   [1913 Webster]

   Syn: To help; assist; support; sustain; succor; relieve;
        befriend; co["o]perate; promote. See Help.
        [1913 Webster]

WordNet (r) 3.0 (2006):

aided
    adj 1: having help; often used as a combining form [syn:
           assisted, aided] [ant: unassisted]