The Collaborative International Dictionary of English v.0.48:

Barrage \Bar"rage\, n. [F., fr. barrer to bar, from barre bar.]
   (Engin.)
   An artificial bar or obstruction placed in a river or
   watercourse to increase the depth of water; as, the barrages
   of the Nile.
   [1913 Webster]

WordNet (r) 3.0 (2006):

barrage
    n 1: the rapid and continuous delivery of linguistic
         communication (spoken or written); "a barrage of
         questions"; "a bombardment of mail complaining about his
         mistake" [syn: barrage, bombardment, outpouring,
         onslaught]
    2: the heavy fire of artillery to saturate an area rather than
       hit a specific target; "they laid down a barrage in front of
       the advancing troops"; "the shelling went on for hours
       without pausing" [syn: barrage, barrage fire, battery,
       bombardment, shelling]
    v 1: address with continuously or persistently, as if with a
         barrage; "The speaker was barraged by an angry audience";
         "The governor was bombarded with requests to grant a pardon
         to the convicted killer" [syn: bombard, barrage]

Moby Thesaurus II by Grady Ward, 1.0:

135 Moby Thesaurus words for "barrage":
   aim at, antiaircraft barrage, arch dam, backstop, bamboo curtain,
   bank, bar, barrier, bear-trap dam, beat, beating, beaver dam,
   blast, blitz, bombard, bombardment, boom, box barrage, breakwater,
   breastwork, brick wall, broadside, buffer, bulkhead, bulwark,
   burst, cannon, cannonade, cannonry, cofferdam, commence firing,
   creeping barrage, dam, defense, dike, ditch, drum, drum music,
   drumbeat, drumfire, drumming, earthwork, embankment,
   emergency barrage, enfilade, eruption, fence, fire a volley,
   fire at, fire upon, flare, flutter, fusillade, gate, gravity dam,
   groin, hail, hydraulic-fill dam, iron curtain, jam, jetty,
   leaping weir, levee, logjam, milldam, moat, mole, mortar,
   mortar barrage, mound, normal barrage, open fire, open up on,
   outburst, palpitation, paradiddle, parapet, patter, pepper,
   pitapat, pitter-patter, pop at, portcullis, pound, pounding,
   pulsation, rake, rampart, rat-a-tat, rat-tat, rat-tat-tat,
   rataplan, rattattoo, roadblock, rock-fill dam, roll, rub-a-dub,
   ruff, ruffle, salvo, seawall, shell, shoot, shoot at, shower,
   shutter dam, snipe, snipe at, spatter, splutter, spray, sputter,
   staccato, standing barrage, stone wall, storm, strafe, stream,
   surge, take aim at, tat-tat, tattoo, throb, throbbing, thrum,
   thumping, tom-tom, tornado, torpedo, volley, wall, weir,
   wicket dam, work, zero in on