The Collaborative International Dictionary of English v.0.48:

Blare \Blare\, v. i. [imp. & p. p. Blared; p. pr. & vb. n.
   Blaring.] [OE. blaren, bloren, to cry, woop; cf. G.
   pl[aum]rren to bleat, D. blaren to bleat, cry, weep. Prob. an
   imitative word, but cf. also E. blast. Cf. Blore.]
   To sound loudly and somewhat harshly. "The trumpet blared."
   --Tennyson.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Blare \Blare\, v. t.
   To cause to sound like the blare of a trumpet; to proclaim
   loudly.
   [1913 Webster]

         To blare its own interpretation.         --Tennyson.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Blare \Blare\, n.
   The harsh noise of a trumpet; a loud and somewhat harsh
   noise, like the blast of a trumpet; a roar or bellowing.
   [1913 Webster]

         With blare of bugle, clamor of men.      --Tennyson.
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         His ears are stunned with the thunder's blare. --J. R.
                                                  Drake.
   [1913 Webster]

WordNet (r) 3.0 (2006):

blare
    n 1: a loud harsh or strident noise [syn: blare, blaring,
         cacophony, clamor, din]
    v 1: make a strident sound; "She tended to blast when speaking
         into a microphone" [syn: blast, blare]
    2: make a loud noise; "The horns of the taxis blared" [syn:
       honk, blare, beep, claxon, toot]