[1] : The Collaborative International Dictionary of English v.0.48

vexatious \vexa"tious\, a. see vexation.
   1. causing vexation; agitating; afflictive; annoying; as, a
      vexatious controversy; a vexatious neighbor. "continual
      vexatious wars." --south.
      1913 webster

   2. full of vexation, trouble, or disquiet; disturbed.
      1913 webster

            he leads a vexatious life.            --sir k.
                                                  digby.
      1913 webster

   vexatious suit law, a suit commenced for the purpose of
      giving trouble, or without cause.
      1913 webster -- vexa"tiously, adv. --
      vexa"tiousness, n.
      1913 webster
see also:
vexation vexatious suit vexa"tiously vexa"tiousness 

[2] : WordNet (r) 2.0

vexatious
     adj : 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, vexing
see also:
annoying bothersome galling irritating nettlesome pesky 
pestering pestiferous plaguy plaguey teasing 
vexing 

[3] : Moby Thesaurus II by Grady Ward, 1.0

46 moby thesaurus words for "vexatious":
   aggravating, annoying, backbreaking, besetting, bothering,
   bothersome, burdensome, crushing, disturbing, exasperating,
   galling, grueling, harassing, heavy, hefty, importunate, importune,
   irking, irksome, irritating, mean, onerous, oppressive, painful,
   pesky, pestering, pestiferous, pestilent, pestilential, plaguesome,
   plaguey, plaguing, provoking, teasing, tiresome, tormenting,
   troublesome, troubling, troublous, trying, ugly, vexing, wearisome,
   wicked, worrisome, worrying

Vexatious >> V Words
Vexatious, definition of term: Vexatious
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