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.
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   2. To molest, incommode, or harm; as, to annoy an army by
      impeding its march, or by a cannonade.
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   Syn: To molest; vex; trouble; pester; embarrass; perplex;
        tease.
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The Collaborative International Dictionary of English v.0.48:

Annoy \An*noy"\, n. [OE. anoi, anui, OF. anoi, anui, enui, fr.
   L. in odio hatred (esse alicui in odio, Cic.). See Ennui,
   Odium, Noisome, Noy.]
   A feeling of discomfort or vexation caused by what one
   dislikes; also, whatever causes such a feeling; as, to work
   annoy.
   [1913 Webster]

         Worse than Tantalus' is her annoy.       --Shak.
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WordNet (r) 3.0 (2006):

annoy
    v 1: cause annoyance in; disturb, especially by minor
         irritations; "Mosquitoes buzzing in my ear really bothers
         me"; "It irritates me that she never closes the door after
         she leaves" [syn: annoy, rag, get to, bother, get
         at, irritate, rile, nark, nettle, gravel, vex,
         chafe, devil]