definition of
keen

[1] #1 keen n. a funeral lament sung with loud wailing. wn

[2] #2 keen v. [lament] express grief verbally; "we lamented the death of the child". wn

[3] #3 keen s. [bang-up, bully, corking, cracking, dandy, great, groovy, neat, nifty, not bad, peachy, slap-up, swell, smashing] very good; "he did a bully job"; "a neat sports car"; "had a great time at the party"; "you look simply smashing". wn

[4] #4 keen s. [cutting, knifelike, piercing, stabbing, lancinate, lancinating] 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". wn

[5] #5 keen s. having a sharp cutting edge or point; "a keen blade". wn