Quick Definition
ἄφνω Adv suddenly
Strong's Definition
adverb from 852 (contraction); unawares, i.e. unexpectedly
KJV Usage: suddenly
UBS Dictionary of the Greek New Testament
advb. | ἐξαίφνης · ἐξάπινα
67.113 · Time · Duration of Time without Reference to Points or Units of Time: Time, Spend Time, Always, Eternal, Old, Immediately, Young
suddenly, at once, immediately pertaining to an extremely short period of time between a previous state or event and a subsequent state or event (in a number of contexts there is the implication of unexpectedness; but this seems to be a derivative of the context as a whole and not a part of the meaning of the lexical items)
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
ἄφνω, adv., (akin to αἴφνης, see in αἰφνίδιος above), suddenly: Acts ii. 2; xvi. 26; xxviii.6. (Sept.; [Aeschyl.], Thue. and subseq. writ.)
Mounce Concise Greek Dictionary
ἄφνω aphnō 3x
suddenly, unexpectedly, Acts 2:2; 16:26; 28:6*
Abbott-Smith Greek Lexicon
ἄφνω, adv.,
[in LXX for פִּתְאֹם;]
suddenly: Ac 2:2 16:26 28:6.†
Liddell-Scott-Jones — Greek-English Lexicon
ἄφνω (aphnō) — suddenly. ἄφνω, adverb unawares, of a sudden, [NT+5th c.BC+]:—also ἄφνως, [Refs]