Thayer-3509

νεφος, νεφους (allied with Latin nubes, nebula, etc.), το, a cloud; in the N. T. once tropically, a large, dense multitude, a throng: μαρτυρων, Heb_12:1; often so in secular authors.

[SYNONYMS: νεφος, νεφελη: νεφος is general, νεφελη specific; the former denotes the great, shapeless collection of vapor obscuring the heavens; the latter designates particular and definite masses of the same, suggesting form and limit.]