Definition of X-acto knife in English:

X-acto knife


North American
  • A utility knife with a very sharp replaceable blade.

    • ‘On the first one he drew the uppermost layer of a crack and cut it out with an X-acto knife.’
    • ‘Use an X-acto knife to cut an X in the center opening, and fold excess fabric into the back of the plate.’
    • ‘I'm guessing it should be possible to disable the serial number by cutting the CLK line to the EEPROM, which should be easy for anyone with a keen eye and a sharp X-acto knife.’
    • ‘Many of the paintings incorporate cut paper and other materials which Schwarz manipulated with a variety of tools, including protractors and X-acto knives.’


1940s: respelling of the adjective exact + -o.


X-acto knife

/iɡˈzaktō ˌnīf/