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adj. keen·er, keen·est
1. Having a fine, sharp cutting edge or point.
2. Having or marked by intellectual quickness and acuity. See Synonyms at sharp.
3. Acutely sensitive: a keen ear.
4. Sharp; vivid; strong: "His entire body hungered for keen sensation, something exciting" (Richard Wright).
5. Intense or bracing: a keen wind.
6. Pungent; acrid: A keen smell of skunk was left behind.
a. Ardent; enthusiastic: a keen chess player.
b. Eagerly desirous: keen on going to Europe in the spring.
8. Slang Great; splendid; fine: What a keen day!
[Middle English kene, from Old English cēne, brave.]
A loud wailing or lament for the dead.
intr.v. keened, keen·ing, keens
To wail in lamentation, especially for the dead. See Synonyms at cry.
[From Irish Gaelic caoineadh, from caonim, I lament, from Old Irish caínim, coínim, perhaps of Brittonic origin.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
informal Canadian a person, esp a student, who is keen, enthusiastic, or zealous
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014