The Collaborative International Dictionary of English v.0.48:

Bray \Bray\, v. i. [OE brayen, F. braire to bray, OF. braire to
   cry, fr. LL. bragire to whinny; perh. fr. the Celtic and akin
   to E. break; or perh. of imitative origin.]
   [1913 Webster]
   1. To utter a loud, harsh cry, as an ass.
      [1913 Webster]

            Laugh, and they
            Return it louder than an ass can bray. --Dryden.
      [1913 Webster]

   2. To make a harsh, grating, or discordant noise.
      [1913 Webster]

            Heard ye the din of battle bray?      --Gray.
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The Collaborative International Dictionary of English v.0.48:

Bray \Bray\ (br[=a]), v. t. [imp. & p. p. Brayed (br[=a]d); p.
   pr. & vb. n. Braying.] [OE. brayen, OF. breier, F. broyer
   to pound, grind, fr. OHG. brehhan to break. See Break.]
   To pound, beat, rub, or grind small or fine.
   [1913 Webster]

         Though thou shouldest bray a fool in a mortar, . . .
         yet will not his foolishness depart from him. --Prov.
                                                  xxvii. 22.
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The Collaborative International Dictionary of English v.0.48:

Bray \Bray\, v. t.
   To make or utter with a loud, discordant, or harsh and
   grating sound.
   [1913 Webster]

         Arms on armor clashing, brayed
         Horrible discord.                        --MIlton.
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         And varying notes the war pipes brayed.  --Sir W.
                                                  Scott.
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The Collaborative International Dictionary of English v.0.48:

Bray \Bray\, n.
   The harsh cry of an ass; also, any harsh, grating, or
   discordant sound.
   [1913 Webster]

         The bray and roar of multitudinous London. --Jerrold.
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The Collaborative International Dictionary of English v.0.48:

Bray \Bray\, n. [OE. braye, brey, brew, eyebrow, brow of a hill,
   hill, bank, Scot. bra, brae, bray, fr. AS. br[=ae]w eyebrow,
   influenced by the allied Icel. br[=a] eyebrow, bank, also
   akin to AS. br[=u] eyebrow. See Brow.]
   A bank; the slope of a hill; a hill. See Brae, which is now
   the usual spelling. [North of Eng. & Scot.] --Fairfax.
   [1913 Webster]

U.S. Gazetteer (1990):

Bray, OK (town, FIPS 8550)
  Location: 34.60883 N, 97.81750 W
  Population (1990): 925 (400 housing units)
  Area: 161.3 sq km (land), 1.8 sq km (water)

Moby Thesaurus II by Grady Ward, 1.0:

161 Moby Thesaurus words for "bray":
   abrade, atomize, bark, bawl, bay, beat, beep, belch, bell, bellow,
   blare, blast, blat, blate, bleat, blow, blow the horn, blubber,
   boom, breathe, brecciate, buck, bugle, burr, buzz, cackle, call,
   caterwaul, caw, chant, chirp, chirr, clang, clangor, clank,
   clarion, clash, comminute, contriturate, coo, craunch, croak, crow,
   crumb, crumble, crump, crunch, crush, cry, disintegrate, drawl,
   exclaim, fanfare, flour, flourish of trumpets, flute, fragment,
   gasp, give tongue, give voice, grain, granulate, granulize, grate,
   grind, grind to powder, groan, growl, grumble, grunt, hiss, honk,
   howl, jangle, jar, keen, levigate, lilt, low, mash, meow, mew,
   mewl, miaow, mill, moo, mumble, murmur, mutter, neigh, nicker,
   pant, peal, pestle, pipe, pound, powder, pule, pulverize, rasp,
   reduce to powder, roar, rumble, scranch, scrape, scratch, screak,
   scream, screech, scrunch, shard, shred, shriek, sibilate, sigh,
   sing, smash, snap, snarl, snore, snort, sob, sound, sound a tattoo,
   sound taps, squall, squash, squawk, squeak, squeal, tantara,
   tantarara, taps, tarantara, tattoo, thunder, toot, tootle,
   triturate, troat, trumpet, trumpet blast, trumpet call, twang,
   tweedle, ululate, wail, warble, whicker, whine, whinny, whisper,
   whistle, wind, yap, yawl, yawp, yell, yelp, yip, yowl