NOUN (1)

1. an insignificant place;
- Example: "he came out of nowhere"


ADVERB (1)

1. not anywhere; in or at or to no place;
- Example: "I am going nowhere"

The Collaborative International Dictionary of English v.0.48:

Nowhere \No"where`\, adv. [AS. n[=a]hw[=ae]r. See No, and
   Where.]
   Not anywhere; not in any place or state; as, the book is
   nowhere to be found.
   [1913 Webster]

WordNet (r) 3.0 (2006):

nowhere
    adv 1: not anywhere; in or at or to no place; "I am going
           nowhere"
    n 1: an insignificant place; "he came out of nowhere"

Moby Thesaurus II by Grady Ward, 1.0:

32 Moby Thesaurus words for "nowhere":
   China, Darkest Africa, God knows where, Greenland, North Pole,
   Outer Mongolia, Pago Pago, Pillars of Hercules, Siberia,
   South Pole, Thule, Tierra del Fuego, Timbuktu, Ultima Thule, Yukon,
   antipodes, frontier, godforsaken place, in no place,
   jumping-off place, nowhither, outback, outer space, outpost,
   outskirts, pole, the Great Divide, the South Seas, the boondocks,
   the moon, the sticks, the tullies