[syn: annoying, bothersome, galling, irritating, nettlesome, pesky, pestering, pestiferous, plaguy, plaguey, teasing, vexatious, vexing]
The Collaborative International Dictionary of English v.0.48:
Annoy \An*noy"\ ([a^]n*noi"), v. t. [imp. & p. p. Annoyed
   ([a^]n*noid"); p. pr. & vb. n. Annoying.] [OE. anoien,
   anuien, OF. anoier, anuier, F. ennuyer, fr. OF. anoi, anui,
   enui, annoyance, vexation, F. ennui. See Annoy, n.]
   To disturb or irritate, especially by continued or repeated
   acts; to tease; to ruffle in mind; to vex; as, I was annoyed
   by his remarks.
   [1913 Webster]
         Say, what can more our tortured souls annoy
         Than to behold, admire, and lose our joy? --Prior.
   [1913 Webster]
   2. To molest, incommode, or harm; as, to annoy an army by
      impeding its march, or by a cannonade.
      [1913 Webster]
   Syn: To molest; vex; trouble; pester; embarrass; perplex;
        tease.
        [1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Annoying \An*noy"ing\, a.
   That annoys; molesting; vexatious. -- An*noy"ing*ly, adv.
   [1913 Webster]
WordNet (r) 3.0 (2006):
annoying
    adj 1: causing irritation or annoyance; "tapping an annoying
           rhythm on his glass with his fork"; "aircraft noise is
           particularly bothersome near the airport"; "found it
           galling to have to ask permission"; "an irritating
           delay"; "nettlesome paperwork"; "a pesky mosquito";
           "swarms of pestering gnats"; "a plaguey newfangled safety
           catch"; "a teasing and persistent thought annoyed him";
           "a vexatious child"; "it is vexing to have to admit you
           are wrong" [syn: annoying, bothersome, galling,
           irritating, nettlesome, pesky, pestering,
           pestiferous, plaguy, plaguey, teasing,
           vexatious, vexing]
    n 1: the act of troubling or annoying someone [syn: annoyance,
         annoying, irritation, vexation]
Moby Thesaurus II by Grady Ward, 1.0:
52 Moby Thesaurus words for "annoying":
   aggravating, aggravative, backbreaking, besetting, bothering,
   bothersome, burdensome, chafing, contentious, crushing,
   disquieting, distressful, distressing, disturbing, exasperating,
   exasperative, fretting, galling, grueling, harassing, heavy, hefty,
   importunate, importune, irking, irksome, irritating, onerous,
   oppressive, painful, pesky, pestering, pestiferous, pestilent,
   pestilential, plaguesome, plaguey, plaguing, provocative,
   provoking, teasing, tiresome, tormenting, troublesome, troubling,
   trying, upsetting, vexatious, vexing, wearisome, worrisome,
   worrying