1.
(of meaning) not clear or plain; ambiguous, vague, or uncertain: an obscure sentence in the contract.
2.
not clear to the understanding; hard to perceive: obscure motivations.
3.
(of language, style, a speaker, etc.) not expressing the meaning clearly or plainly.
4.
indistinct to the sight or any other sense; not readily seen, heard, etc.; faint.
5.
inconspicuous or unnoticeable: the obscure beginnings of a great movement.
6.
of little or no prominence, note, fame, or distinction: an obscure french artist.
7.
far from public notice, worldly affairs, or important activities; remote; retired: an obscure little town.
8.
lacking in light or illumination; dark; dim; murky: an obscure back room.
9.
enveloped in, concealed by, or frequenting darkness.
10.
not bright or lustrous; dull or darkish, as color or appearance.
11.
(of a vowel) having the reduced or neutral sound usually represented by the schwa (ə

.
http://dictionary.reference.com/browse/Obscure