The Collaborative International Dictionary of English v.0.48:

Galilean \Gal`i*le"an\, a. [L. Galilaeus, fr. Galilaea Galilee,
   Gr. ?: cf. F. galil['e]en.]
   Of or relating to Galilee.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Galilean \Gal`i*le"an\, n.
   1. A native or inhabitant of Galilee, the northern province
      of Palestine under the Romans.
      [1913 Webster]

   2. (Jewish Hist.) One of the party among the Jews, who
      opposed the payment of tribute to the Romans; -- called
      also Gaulonite.
      [1913 Webster]

   3. A Christian in general; -- used as a term of reproach by
      Mohammedans and Pagans. --Byron.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Galilean \Gal`i*le"an\, a.
   Of or pertaining to Galileo; as, the Galilean telescope. See
   Telescope.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Galilean
    adj 1: of or relating to Galileo or his works
    2: of or relating to Galilee or its inhabitants [syn:
       Galilean, Galilaean]
    n 1: an inhabitant of Galilee (an epithet of Jesus Christ) [syn:
         Galilean, Galilaean]
    2: one of the four satellites of Jupiter that were discovered by
       Galileo [syn: Galilean satellite, Galilean]