The Collaborative International Dictionary of English v.0.48:

Hallow \Hal"low\ (h[a^]l"l[-o]), v. t. [imp. & p. p.
   Hallowed(-l[-o]d); p. pr. & vb. n. Hallowing.] [OE.
   halowen, halwien, halgien, AS. h[=a]lgian, fr. h[=a]lig holy.
   See Holy.]
   To make holy; to set apart for holy or religious use; to
   consecrate; to treat or keep as sacred; to reverence.
   "Hallowed be thy name." --Matt. vi. 9.
   [1913 Webster]

         Hallow the Sabbath day, to do no work therein. --Jer.
                                                  xvii. 24.
   [1913 Webster]

         His secret altar touched with hallowed fire. --Milton.
   [1913 Webster]

         In a larger sense . . . we can not hallow this ground
         [Gettysburg].                            --A. Lincoln.
   [1913 Webster]

WordNet (r) 3.0 (2006):

hallow
    v 1: render holy by means of religious rites [syn: consecrate,
         bless, hallow, sanctify] [ant: deconsecrate,
         desecrate, unhallow]

Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "hallow":
   beat the drum, beatify, bless, blow the trumpet, canonize,
   celebrate, cleanse, commemorate, consecrate, dedicate, devote,
   dress ship, enshrine, exalt, fire a salute, glorify, hold jubilee,
   honor, jubilate, jubilize, keep, maffick, make merry, mark,
   memorialize, observe, purify, respect, revere, reverence, saint,
   sanctify, set apart, signalize, solemnize, solemnly mark,
   sound a fanfare, venerate, worship



Easton's 1897 Bible Dictionary:

Hallow
   to render sacred, to consecrate (Ex. 28:38; 29:1). This word is
   from the Saxon, and properly means "to make holy." The name of
   God is "hallowed", i.e., is reverenced as holy (Matt. 6:9).