Source : Webster's Revised Unabridged Dictionary (1913)

Obscurant \Ob*scur"ant\, n. [L. obscurans, p. pr. of obscurare
   to obscure.]
   One who obscures; one who prevents enlightenment or hinders
   the progress of knowledge and wisdom. --Coleridge.

Source : WordNet®

obscurant
     adj : making undecipherable or imperceptible; "obliterating
           mists"; "an obscurant bank of clouds" [syn: {obliterating}]