The Collaborative International Dictionary of English v.0.48:

Luke \Luke\ (l[=u]k), a. [Prob. fr. lew, perh. influenced by AS.
   wl[ae]c warm, lukewarm, remiss. Cf. Lew.]
   Moderately warm; not hot; tepid; lukewarm. -- Luke"ness, n.
   [Obs.]
   [1913 Webster]

         Nine penn'orth o'brandy and water luke.  --Dickens.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Luke
    n 1: (New Testament) the Apostle closely associated with St.
         Paul and traditionally assumed to be the author of the
         third Gospel [syn: Luke, Saint Luke, St. Luke]
    2: one of the four Gospels in the New Testament; contains
       details of Jesus's birth and early life [syn: Luke, Gospel
       of Luke, Gospel According to Luke]