The Collaborative International Dictionary of English v.0.48:

Space \Space\, v. t. [imp. & p. p. Spaced; p. pr. & vb. n.
   Spacong.] [Cf. F. espacer. See Space, n.] (Print.)
   To arrange or adjust the spaces in or between; as, to space
   words, lines, or letters.
   [1913 Webster]

WordNet (r) 3.0 (2006):

spaced
    adj 1: spaced apart [syn: separated, spaced]
    2: arranged with spaces between; often used as a combining form;
       "widely spaced eyes" [ant: unspaced]