Dictionary entry

ἄκρος

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

ἄκρος, -α, -ον

[in LXX for קֶצַח, בֹּהֶן, etc.;]

highest, extreme; as subst., τὸ ἄ., the top, extremity: Mk 13:27, Lk 16:24, He 11:21; pl. (cf. MM, VGT, s.v.), Mt 24:31.†