[syn: loudly, loud, aloud]
The Collaborative International Dictionary of English v.0.48:
Loud \Loud\, adv. [AS. hl[=u]de.]
   With loudness; loudly.
   [1913 Webster]
         To speak loud in public assemblies.      --Addison.
   [1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Loud \Loud\ (loud), a. [Compar. Louder (loud"[~e]r); superl.
   Loudest.] [OE. loud, lud, AS. hl[=u]d; akin to OS. hl[=u]d,
   D. luid, OHG. l[=u]t, G. laut, L. -clutus, in inclutus,
   inclitus, celebrated, renowned, cluere to be called, Gr.
   klyto`s heard, loud, famous, kly`ein to hear, Skr. [,c]ru.
   [root]41. Cf. Client, Listen, Slave a serf.]
   1. Having, making, or being a strong or great sound; noisy;
      striking the ear with great force; as, a loud cry; loud
      thunder.
      [1913 Webster]
            They were instant with loud voices, requiring that
            he might be crucified.                --Luke xxiii.
                                                  23.
      [1913 Webster]
   2. Clamorous; boisterous.
      [1913 Webster]
            She is loud and stubborn.             --Prov. vii.
                                                  11.
      [1913 Webster]
   3. Emphatic; impressive; urgent; as, a loud call for united
      effort. [Colloq.]
      [1913 Webster]
   4. Ostentatious; likely to attract attention; gaudy; as, a
      loud style of dress; loud colors. [Slang]
   Syn: Noisy; boisterous; vociferous; clamorous; obstreperous;
        turbulent; blustering; vehement.
        [1913 Webster]
WordNet (r) 3.0 (2006):
loud
    adv 1: with relatively high volume; "the band played loudly";
           "she spoke loudly and angrily"; "he spoke loud enough for
           those at the back of the room to hear him"; "cried aloud
           for help" [syn: loudly, loud, aloud] [ant:
           quietly, softly]
    adj 1: characterized by or producing sound of great volume or
           intensity; "a group of loud children"; "loud thunder";
           "her voice was too loud"; "loud trombones" [ant: soft]
    2: tastelessly showy; "a flash car"; "a flashy ring"; "garish
       colors"; "a gaudy costume"; "loud sport shirts"; "a
       meretricious yet stylish book"; "tawdry ornaments" [syn:
       brassy, cheap, flash, flashy, garish, gaudy,
       gimcrack, loud, meretricious, tacky, tatty,
       tawdry, trashy]
    3: used chiefly as a direction or description in music; "the
       forte passages in the composition" [syn: forte, loud]
       [ant: piano, soft]
Moby Thesaurus II by Grady Ward, 1.0:
113 Moby Thesaurus words for "loud":
   aloud, blaring, blatant, blinding, booming, brassy, brazen,
   brazenfaced, chintzy, clamant, clamorous, coarse, colorful, crass,
   crude, crying, deafening, demanding, draining, ear-piercing,
   ear-rending, ear-splitting, earsplitting, earthshaking, earthy,
   exacting, exigent, exorbitant, extortionate, extravagant, flagrant,
   flaring, flashy, flaunting, forte, fortemente, fortissimo, full,
   fulminating, garish, gaudy, glaring, gorgeous, grasping, gross,
   harsh, hoarse, importunate, in full cry, insistent, instant,
   intense, jazzy, loud-sounding, loudish, loudly, lurid, lustily,
   meretricious, noisily, noisy, obnoxious, obscene, obtrusive,
   offensive, ostentatious, overbright, pealing, penetrating,
   persistent, pertinacious, piercing, plangent, pressing, pungent,
   raucous, raw, reeking, resonant, resounding, resoundingly, ribald,
   ringing, ringingly, roaring, rough, rude, screaming, sensational,
   shameless, showy, shrieking, snazzy, sonorous, spectacular,
   splashy, stentoraphonic, stentorian, stentorious, stertorous,
   strident, tasteless, tawdry, taxing, thundering, thunderous,
   tinsel, tonitruant, tonitruous, uproariously, urgent, vulgar,
   window-rattling