n.1 a any of various large birds of prey of the family Accipitridae, with keen vision and powerful flight. b a figure of an eagle, esp. as a symbol of the US, or formerly as a Roman or French ensign.
2 Golf a score of two strokes under par at any hole.
3 US a coin worth ten dollars.
Phrases and idioms:
eagle eye keen sight, watchfulness. eagle-eyed keen-sighted, watchful. eagle owl any large owl of the genus Bubo, with long ear tufts.
Etymology: ME f. AF egle, OF aigle f. L aquila