Definition of keen
(adj)
having or demonstrating
ability to
recognize or
draw fine distinctions; "an
acute observer of
politics and politicians"; "incisive comments"; "icy knifelike reasoning"; "as
sharp and incisive as the
stroke of a fang"; "penetrating insight"; "frequent penetrative observations"
intense or sharp; "suffered exquisite pain"; "felt exquisite pleasure"
painful as if caused by a
sharp instrument; "a
cutting wind"; "keen winds"; "knifelike cold"; "piercing knifelike pains"; "piercing cold"; "piercing criticism"; "a stabbing pain"; "lancinating pain"