utility knife
US /juːˈtɪl.ɪ.t̬i naɪf/
UK /juːˈtɪl.ɪ.t̬i naɪf/
1.
a knife with a short, sharp blade, often retractable, used for cutting various materials in general household or craft tasks.
:
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He used a utility knife to open the cardboard box.
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Make sure to retract the blade of the utility knife when not in use.