Quick Definition
ὀξύς, εῖα, ύ Adj sharp, swift, eager
Strong's Definition
probably akin to the base of 188 ("acid"); keen; by analogy, rapid
KJV Usage: sharp, swift
UBS Dictionary of the Greek New Testament
adjc. | -εῖα, -ύ | ὄξος · παροξύνομαι · παροξυσμός
79.95 · Features of Objects · Sharp
sharp pertaining to having a thin cutting edge
REV 1:16 · REV 2:12 · REV 14:14 · REV 14:17 · REV 14:18 · REV 14:18 · REV 19:15
67.112 · Time · Duration of Time without Reference to Points or Units of Time: Time, Spend Time, Always, Eternal, Old, Immediately, Young
quick, swift pertaining to a very short period of time, with the probable implication of special haste It would also be possible to understand ὀξεῖς οἱ πόδες αὐτῶν ‘their feet are swift’ as being an idiom, but ὀξύς occurs frequently in non-biblical Greek with the meaning of ‘quick, swift, soon.’ In ROM 3:15 οἱ πόδες αὐτῶν is a metonymic expression meaning ‘the people,’ so that it is not simply the feet that are swift to shed blood, but it is the people who are quick to kill.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
ὀξύς, -eia, -v, [allied w. Lat. acer, acus, etc.; ef. Curtius § 2]; 1. sharp (fr. Hom. down) : ῥομφαία, δμέπαvoy, Rev. 1: 16; ii. 12; xiv. 14, 17 sq.; xix. 15, (Is. v. 28; Ps. lvi. (Ivii.) 5). 2. swift, quick, (so fr. Hdt. 5, 9 down; cf. ὠκύς fleet): Ro. iii. 15 (Am. ii. 15; Prov. xxii. 29).
Mounce Concise Greek Dictionary
ὀξύς oxys 8x
sharp, keen, Rev. 1:16; 2:12; 14:14, 17, 18; 19:15; swift, nimble, Rom. 3:15*
Abbott-Smith Greek Lexicon
ὀξύς, -εῖα, -ύ,
[in LXX: Ps 56 (57):4, al. (חַד), Am 2:15 (קַל), Is 5:28 (שׁנן), etc.;]
sharp: Re 1:16 2:12 14:14, 17, 18 19:15.
Of motion, swift: Ro 3:15 (LXX ταχινός).†
Liddell-Scott-Jones — Greek-English Lexicon
ὀξύς (oxus) — sharp/swift. ὀξύς, ύδος, ἡ, wood sorrel, Oxalis Acetosella, [Refs 1st c.AD+]
2. ={ὀξύσχοινος}, great sea-rush, Juncus acutus, [Refs]
3. ={ὀξαλίς}, sorrel, Rumex acetosa, [Refs 2nd c.AD+]