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1.
To be excited or interested about something.
"Are you keen for a game of pool."
by Diego July 12, 2003
 
2.
eager or obsessive about someone or something.
that girl is so keen on hooking up with you.
by linds January 11, 2005
 
3.
Collective term for Hybrid footwear by Keen Footwear. Keen's HybridLife message is "Create. Play. Care." Their initial range, consisting primarily of river sandals and the rubber Yogi, debuted only in 2004 but met with such success the line rapidly expanded to encompass outdoor performance, rugged, and lifestyle footwear.

Keens are a bit more stylish and upscale than their assumed rivals, Chaco and Teva. However, Keen's lifestyle footwear in particular the Market Street and Boulevard collections, embrace the concept of urbaneering. Keens are probably the closest thing today to the "rich hippy" aesthetic of the late 1960s and 1970s but are very today. They could be described as Outside magazine meets Wallpaper magazine but are rugged and functional enough for hardcore dirtbags. Consequently, Keens are often worn by male and female MountainSexuals.

In laid-back areas such as the Arkansas River Valley of Colorado and in mountain towns such as Buena Vista Colorado, some models of Keens are actually considered very dressy. This makes Keen perhaps the most comprehensive outdoors footwear line available - the possible exceptions being Patagonia footwear and Merrell.

Keen now offers a line of sleek and functional backpacks and bags. These are very useful for travel and urbaneering.

Keen footwear and bags and packs are available only in better outdoor specialty stores such as The Trailhead in Buena Vista, Colorado.
She - "Those are some really nice looking shoes, but what's up with that toe?"

He - "They're Keens - the 'Targhee' light hiking boots. They are waterproof, breathable, and very comfortable. The toe adds to the rugged durability."

She - "Oh, I've heard of Keen. A friend of mine got one of their packs from The Trailhead in Buena Vista. But it was very stylish - it looked great for a long flight. I didn't know they did shoes, but they look as cool as her pack."

He - "They did shoes before the packs. They make a great full line. You should go to The Trailhead and check them out. You'll love them."
by da Chetster April 09, 2009
 
4.
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 01, 2007
 
5.
used to describe something that is in a good state, or prudent

synonyms: rocking, cool, smart
my new shirt is keen!

keen of you to do this assignment the night before it was due!
by Anonymous March 11, 2003
 
6.
Something so cool and original and great that everyone loves it so much; something that is super swell

Being brought back by Ms. Emily of Brown College fame @ UVA
Man these chocolate chip cookies are Keen; Dude that book is so keen; The white spot is super keen
by Matt November 14, 2004
 
7.
This term is used when a person is willing to have sex with someone.
Person 1: "Keen?"
Person 2: "Sure thing chicken wing ;)"
by The Truth Uncovered July 11, 2013