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]

Easton's 1897 Bible Dictionary:

Galilean
   an inhabitant or native of Galilee. This word was used as a name
   of contempt as applied to our Lord's disciples (Luke 22:59; Acts
   2:7). All the apostles, with the exception of Judas Iscariot
   (Acts 1:11), were Galileans. Peter was detected by his Galilean
   accent (Matt. 26:69; Mark 14:70).

     This was also one of the names of reproach given to the early
   Christians. Julian the Apostate, as he is called, not only used
   the epithet himself when referring to Christ and his apostles,
   but he made it a law that no one should ever call the Christians
   by any other name.