A sharpness or quickness of the mind.
Yes, Silveria was autistic, but there was a quiet keenness about her.
by hardi013 September 11, 2013
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To be eager, excited or interested in something/someone. A word of many facets.
Q: "We should watch Fresh Off the Boat tonight"
C: "Yeah, I'm totally keen!"

Q: *takes a large bite out of phallus shaped chocolate bar*
C: "Damn, you keen!"

Q: "Let's have tacos for dinner!"
C: "Nahhh, I'm not that keen on Mexican"
by Rain1110 March 15, 2015
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Literally meaning unenthusiastic and unexcited, it is generally used when you don't want to do a certain activity or action.
Use this to completely shut down a person's request. Just continue saying 'Not Keen' to all their plea's, until they get bored and stop bothering you.
OR Friend: Be my wingman at this party, old mate.
Me: No Way! Not Keen.

OR Friend: Pass me my wallet.
Me: Nup, Not Keen.

OR (Rare situation) Friend: Smoke another billy man.
Me: Not Keen.
by Diego November 25, 2003
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a high pitched crying or noise, kind of similar a whimper. somewhat between a moan and a whine. it's most commonly used in fan fiction smut, especially on AO3.
'He keens underneath him with a breath of intake, but he stays quiet.' & 'He keens into the pillow'
by willsoIace May 21, 2023
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1)Eager to do something, or someone.
2)Used to describe someone who is ready and willing for sex, anywhere anytime.

1) are you keen for a pizza matt?
2)
joe. do you think she'd go a three-way?
marcus. yeah, she looks pretty keen
by matthew szwec November 1, 2007
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eager or obsessive about someone or something.
that girl is so keen on hooking up with you.
by linds January 11, 2005
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