Lexical Definition

‎γνόφος‎ gnóphos (gnof'-os) darkness G:N-M
akin to ‎νέφος‎

blackness.

Usage: 5 forms in 26 verses
Form Translated As     In Verse(s)
γνόφῳ to darkness Heb.12.18
γνόφω by dimness LXX.Job.9.17
dimness LXX.1Kgs.8.12LXX.2Chr.6.1LXX.Job.17.13LXX.Jer.23.12
γνόφου dark LXX.Job.22.13
dimness LXX.Ezek.34.12LXX.Joel.2.2
of dimness LXX.Zeph.1.15
γνόφοσ a dimness LXX.Isa.60.2
dark LXX.Job.27.20
dimness LXX.Exod.10.22LXX.Exod.14.20LXX.Deut.4.11LXX.Deut.5.22LXX.2Sam.22.10LXX.Job.3.5LXX.Job.23.17LXX.Ps.18.9LXX.Ps.97.2LXX.Ezek.34.12LXX.Amos.5.20
γνόφον dimness LXX.Exod.20.21LXX.Josh.24.7LXX.Isa.44.22

Abbott-Smith

γνόφος (later form of δν-), [in LXX for אָפֵל, עֲרָפֶל, etc. ;]
darkness, gloom (including "an element of tempest," Tr., Syn., §c): He 12:18.†
SYN.: ἀχλύς, ζόφος, σκότος (Tr., l.c.; DB, i, 457a).

Abbott-Smith References

Book Refs
Hebrews 12:18

Liddell-Scott-Jones

γνόφος-ος,

later form for δνόφος, darkness, [NT+4th c.BC+]: plural, storm-clouds, [Refs 4th c.BC+]

LSJ Scripture Refs: Heb.12.18