Lexical Definition

‎בָּרָק‎ bârâq (baw-rawk') to use lightning H:V
from ‎בָּרַק‎

bright, glitter(-ing sword), lightning.

1) lightning
1a) lightnings, lightning flashes
1b) of flashing arrow-head (fig.)

See Greek: ἀστραπή · ἀστράπτω · ἄστρον · Βαράκ · ἐξαστράπτω

Brown-Driver-Briggs

‎בָּרָק‎ noun masculineEzek 1:13 lightning (chiefly in poetry) (Arabic , Assyrian bir‡u COTGloss, ZimBP 76, 82 Aramaic ‎בְּרַק‎, ) — absolute ‎׳‎‎ב‎ Job 20:25 + 7 t. 2Sam 22:15 (compare below); construct ‎בְּרַק‎ Deut 32:41 + 2 t.; plural ‎בְּרָקִים‎ Exod 19:16 + 7 t., ‎בְּרָקָיו‎ Ps 97:4lightning,

1. literal mostly plural = lightnings, lightning-flashes Exod 19:16; Ps 18:15* 9 in theophanies, on 2Sam 22:15 see below) Ps 77:19*; Ps 97:4; Ps 135:7; Job 38:35; Jer 10:13; Jer 51:16 so in simile of swift brightness Nah 2:5*, singular only Ps 144:6; 2Sam 22:15 (where however read ‎בְּרָקִים בָּרַק‎ compare ‎בָּרַק‎ — so ᵐ5L Klo Che, compare his critical note Ps 18:15*), Ezek 1:13 (in vision), and in simile of brightness Dan 10:6 swift destruction Zech 9:14.

2. figurative (always singular) of flashing arrow-head Job 20:25, compare ‎חרב‎ ‎׳‎‎ב‎ Deut 32:41, ‎חנית‎ ‎׳‎‎ב‎ Nah 3:3; Hab 3:11 compare glitter of weapon Exod 21:15; Exod 21:20; Exod 21:33.

Brown-Driver-Briggs References

Book Refs
Exodus 19:16 · 21:15 · 21:20 · 21:33
Deuteronomy 32:41
2 Samuel 22:15
Job 20:25 · 38:35
Psalms 18:15* · 77:19* · 97:4 · 135:7 · 144:6
Jeremiah 10:13 · 51:16
Ezekiel 1:13
Daniel 10:6
Nahum 2:5* · 3:3
Habakkuk 3:11
Zechariah 9:14