Nebulous \Neb"u*lous\, a. [L. nebulosus: cf. F. n['e]buleux. See Nebula.]

1. Cloudy; hazy; misty.

2. (Astron.) Of, pertaining to, or having the appearance of, a nebula; nebular; cloudlike. -- Neb"u*lous*ly, adv. -- Neb"u*lous*ness, n.

Source: Webster's Revised Unabridged Dictionary (1913)