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

odyssey \od"yssey\ o^d"i^ssy^, n. l. odyssea, gr.
   'ody`sseia, fr. 'odyssey`s ulysses: cf. f. odyss'ee.
   an epic poem attributed to homer, which describes the return
   of ulysses to ithaca after the siege of troy.
   1913 webster

[2] : WordNet (r) 2.0

odyssey
     n 1: a long wandering and eventful journey
     2: a greek epic poem attributed to homer describing the
        journey of odysseus after the fall of troy

Odyssey >> O Words
Odyssey, definition of term: Odyssey
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