Lexical Definition

‎ἀκριβέστατος‎ akribéstatos (ak-ree-bes'-ta-tos) strictest ^G:A
superlative of (a derivative of the same as ‎ἄκρον‎)

most straitest.

• most exact

Abbott-Smith

ἀκριβής, -ές [in LXX: Da LXX 2:45 6:12* (יַצִּיב) Da 4:25*, Es 4:5, Si 18:29 19:25 31:24 32:3*;]
exact, precise, careful, of things and persons: superl., Ac 26:5.†

Abbott-Smith References

Liddell-Scott-Jones

Related to: ἀκριβέστατος-ής, ές,

exact, accurate, precise, [Refs 5th c.BC+]; τριταῖος returning precisely at its time, [Refs]; γαλήνη complete calm, [Refs 4th c.AD+]

__II of persons, precise, strict, δικασταί[Refs 5th c.BC+]; ἀ. τοῖς ὄμμασι sharp- sighted, [Refs 3rd c.BC+]; of arguments, [Refs 5th c.BC+]; τὸ ἀ., ={ἀκρίβεια}, [Refs 5th c.BC+]adverb -βῶς to a nicety, precisely, ἀ. εἰδέναι, ἐπίστασθαι, καθορᾶν, μαθεῖν, etc., [Refs 5th c.BC+]; opposed to ἁπλῶς, [Refs 5th c.BC+]; opposed to τύπῳ (in outline, roughly), [Refs 4th c.BC+]: comparative -έστερον[NT+5th c.BC+]: superlative -έστατα[Refs 5th c.BC+]; ἀ. καὶ μόλις with greatest difficulty, [Refs 1st c.AD+] —also οὐκ εἰς ἀκριβὲς ἦλθες at the right moment, [Refs 5th c.BC+]
__II.2 in the strict sense of the word, ὁ ἀ. ἰατρός[Refs 5th c.BC+]
__II.2.b pure-bred, genuine, Κόλχος[Refs 4th c.AD+]
__II.2.c Astron., true, opposed to φαινόμενος, [Refs 5th c.AD+]
__II.3 parsimonious, stingy, ἀ. τοὺς τρόπους[Refs 4th c.BC+]. adverb -βῶς, διαιτᾶσθαι[Refs 5th c.BC+] —Rare except in _Attic dialect_, mostly Prose. (The sense points to ἄκρος as the first part of the word, but -ῑβης remains uncertain)

_{LSJ Scripture Refs: Acts.18.26}