Liddell-Scott-Jones

ἄκρα (akra) Akra ^TEGMC

ἄκρα,

Ionic dialect ἄκρη, ἡ, (feminine of ἄκρος) highest or farthest point:

__1 headland, cape, [Refs 8th c.BC+]
__2 hill-top, height, [Refs 8th c.BC+]
__3 of a wave, crest, οὐ γὰρ ὑπερθεῖν κύματος ἄκραν δυνάμεσθα[Refs 5th c.BC+]
__4 [Refs 8th c.BC+] from top to bottom, i.e. utterly, [Refs 8th c.BC+]; γῆν πατρῴαν.. πρῆσαι κατ᾽ ἄ. utterly, [Refs 5th c.BC+] how utterly..! [Refs 5th c.BC+]; but ἔλασεν μέγα κῦμα κατ᾽ ἄ. from above, [Refs 8th c.BC+]
__5 citadel built on a steep rock overhanging a town (usually ἀκρόπολις), [Refs 5th c.BC+]
__6 end, extremity, [Refs 4th c.BC+]; of the extremes in a proportion, [Refs 3rd c.BC+]