1. Having a sharp or distinct edge
   "a narrow knifelike profile"
    
2. Cutting or able to cut as if with a knife
   "The knifelike wind cut through their thin jackets"
    
3. Painful as if caused by a sharp instrument
   "knifelike cold"; "piercing knifelike pains";
   - cutting, keen, piercing, stabbing, lancinate, lancinating
    
4. Having or showing quick and precise discernment or understanding; mentally perceptive and astute
   "icy knifelike reasoning";
   - acute, discriminating, incisive, keen, penetrating, penetrative, piercing, sharp

See also: distinct, perceptive, sharp