adj. 1 a full of keen desire, enthusiastic. b (of passions etc.) keen, impatient. 2 keen, impatient, strongly desirous (eager to learn; eager for news). eager beaver colloq. a very or excessively diligent person. eagerly adv. eagerness n.
[ ME f. AF egre, OF aigre keen, ult. f. L acer acris ]