Lexical Definition

‎עֲלָטָה‎ ʻălâṭâh (al-aw-taw') darkness H:N-F
feminine from an unused root meaning to cover

dark, twilight.

1) thick darkness

Usage: 3 forms in 4 verses
Form Translated As     In Verse(s)
וַעֲלָטָ֖ה and darkness Gen.15.17
בָּעֲלָטָ֥ה in the darkness Ezek.12.7
בָּעֲלָטָ֣ה in the darkness Ezek.12.6Ezek.12.12

Brown-Driver-Briggs

‎עֲלָטָה‎ noun feminine thick darkness **< darkness, dusk, which suits both passages (Bevan, privately). (Late Hebrew ‎עֲלָטָה‎ (rare); according to BaES 5 transposes from Arabic [be cloudy]; darkness); — absolute ‎׳‎‎ע‎, attending sunset Gen 15:17 (with verb masculine; AlbrZAW xv (1895), 325 Synt. § 350 e read ‎הָֽיְתָה‎); ‎׳‎‎בַּע‎ Ezek 12:7 (|| ‎בָּעֶרֶב‎), vEzek 12:6 vEzek 12:12.

‎עֵלִי‎, ‎עֱלִי‎, ‎עִלִּי‎, ‎עֲלִיָּה‎, ‎עֶלְיוֺן‎ see ‎עלה‎. p. 750f‎עֲלֵי‎ see ‎עַל‎. ‎עַלְיָה‎, ‎עַלְיָן‎ see ‎עלוה‎, ‎עלוז‎.p.752

Brown-Driver-Briggs References

Book Refs
Genesis 15:17
Ezekiel 12:6 · 12:7 · 12:12