WordWeb Online

1. Cutting or able to cut as if with a knife
    
2. Having or demonstrating ability to recognize or draw fine distinctions
   "icy knifelike reasoning"
   - acute, discriminating, incisive, keen, penetrating, penetrative, piercing, sharp
    
3. Painful as if caused by a sharp instrument
   "knifelike cold"; "piercing knifelike pains"
   - cutting, keen, piercing, stabbing, lancinate, lancinating
    
4. Having a sharp or distinct edge
   "a narrow knifelike profile"

See also: distinct, perceptive, sharp