Lexical Definition

‎ἀκριβόω‎ akribóō (ak-ree-bo'-o) be exactly ^G:V
from the same as ‎ἀκριβέστατος‎

enquire diligently.

• to be exact, i.e. ascertain

Abbott-Smith

** ἀκριβόω, -ῶ (< ἀκριβής), [in Aq.: Is 30:8 49:16*;]
to enquire with exactness, learn carefully: Mt 2:7, 16 (for similar ex., v. MM, VGT, sv.).†

Abbott-Smith References

Liddell-Scott-Jones

ἀκριβόω-όω,

future -ώσω, make exact or accurate, [Refs 5th c.BC+]; ἀ. τάδε to be perfect in bearing these hardships, [Refs 5th c.BC+]; arrange precisely, [Refs 5th c.BC+]:—passive, to be exact or perfect, [Refs 5th c.BC+]—Later in middle, [Refs 1st c.AD+]

__2 investigate accurately, understand thoroughly, οἱ τάδ᾽ ἠκριβωκότες[Refs 5th c.BC+]; τοὔνομά μου σὺ ἀκριβοῖ; are you sure of..? [Refs 5th c.BC+]; inquire carefully of, τὸν χρόνον[NT]:—passive, [Refs 2nd c.AD+]
__3 describe accurately, τι [Refs 1st c.BC+]
__4 absolutely, to be exact, ἡ φύσις οὐκ ἀκριβοῖ[Refs 4th c.BC+]

_{LSJ Scripture Refs: Matt.2.7}