1.highest, topmost, ἐν ἄκρηι πόλει ῀ ἐν ἀκροπόλει, Il.; μέλαν ὕδωρ ἄκρον at its surface, id=Il., etc.
2.outermost, ἄκρη χείρ, ἄκροι πόδες, ἄκρος ὦμος the end of the hand, ends of the feet, tip of the shoulder, id=Il., Thuc.; ἐπ᾽ ἄκρων [δακτύλων] on tiptoe, Soph.; ἄκροισι λαίφους κρασπέδοις with the outermost edges of the sail, i. e. under close-reefed sails, Eur.
II.of Time, it denotes completeness, ἄκραι σὺν ἑσπέραι when eve was fully come, Pind.; ἄκρας νυκτός at dead of night, Soph.
III.of Degree, the highest in its kind, exceeding good, consummate, excellent: of persons, Hdt., etc.; ἄκρος μάντις Soph.:—often with an acc. modi added, ψυχὴν οὐκ ἄκρος not strong in mind, Hdt.; ἄκροι τὰ πολέμια, skilful in war, id=Hdt., etc.; also c. gen. modi, οἱ ἄκροι τῆς ποιήσεως Plat.; also, ἄκρος εἰς or περί τι id=Plat.
2.exceedingly, Theocr.
3.utterly, completely, Plat.