[nahyf] 
noun, plural knives [nahyvz] , verb, knifed, knif⋅ing.| 1. | an instrument for cutting, consisting essentially of a thin, sharp-edged, metal blade fitted with a handle. |
| 2. | a knifelike weapon; dagger or short sword. |
| 3. | any blade for cutting, as in a tool or machine. |
| 4. | to apply a knife to; cut, stab, etc., with a knife. |
| 5. | to attempt to defeat or undermine in a secret or underhanded way. |
| 6. | to move or cleave through something with or as if with a knife: The ship knifed through the heavy seas. |
| 7. | under the knife, in surgery; undergoing a medical operation: The patient was under the knife for four hours. |
