Lexical Definition

‎εὐλάβεια‎ eulábeia (yoo-lab'-i-ah) reverence ^G:N-F
from ‎εὐλαβής‎

fear(-ed).

• properly, caution, i.e. (religiously) reverence (piety)
• by implication, dread (concretely)

Abbott-Smith

εὐλάβεια, -ας, ἡ (< εὐλαβής), [in LXX: Je 22:24 (דְּאָגָה), Pr 28:14, Wi 17:8 * ;]
1. caution, discretion (Soph., Plat., al.).
2. In later Gk. (Diod., Plut., al.), also reverence, godly fear: He 5:7 12:28.†
SYN.: v.s. δειλία (q.v.), φόβος (cf. Cremer, 387 f., 759; DB, ii. 222).

Abbott-Smith References

Liddell-Scott-Jones

εὐλάβεια-εια [λᾰ], ἡ,

Ionic dialect -ιη[Refs 6th c.BC+]:— discretion, caution, [Refs 6th c.BC+]; εὐλάβειαειαν ἔχειν μή.., ={εὐλαβεῖσθαι μή}.., [Refs 5th c.BC+]; so εὐ. αὕτη.. τὸ μὴ νέους.. γεύεσθαι caution to preuent their tasting, [Refs]; εὐλαβείας οὐ μικρᾶς δεῖται, εὐ. ἐστὶ πολλῆς, [Refs 4th c.BC+]; εὐ. ποιητέον περί τινας[Refs 1st c.BC+]; ἐπ᾽ εὐλαβεία.. προείρηται by way of caution, [Refs 5th c.BC+]; ἐπ᾽ εὐ. in [Refs 4th c.BC+]

__2 with genitive, caution or discretion in a thing, πολλὴ εὐ. τούτων ποιητέα [Refs 5th c.BC+]; εὐλάβειαειαι πληγῶν auoidance of.., [εὐλάβειαειαν τῶνδε προυθέμην [prev. author] “El.” 1334 ">Refs 5th c.BC+]; ἡ τῶν περιεχόντων εὐ. careful employment of.., [Refs 1st c.BC+]
__3 reverence, piety, πρὸς or περὶ τὸ θεῖον, [Refs 1st c.BC+]: absolutely, godly fear, [NT]; religious scruple, οὐδεμίαν εὐ. προορωμένων [Refs 2nd c.BC+]
__3.b astitle, ἡ σὴ εὐ. your reverence, [Refs 6th c.AD+]
__4 in bad sense, over-caution, timidity, [Refs 1st c.AD+]

_{LSJ Scripture Refs: Heb.5.7}