mul·​ti-tool | \ ˈməl-tē-ˌtül How to pronounce multi-tool (audio) , -ˌtī-\
variants: or less commonly multitool

Definition of multi-tool

: a compact, portable device that has blades and extensions for many tools (such as knives, screwdrivers, pliers, scissors, openers, and saw blades) which can be folded into the handle … it's good to know you have tools in the car to get you out of a pickle that your multi-tool can't …— Jennifer Sherry To my mind, the coolest feature is the multi-tool, which sports a standard blade, serrated blade, screwdriver and bottle opener.— Doug Aamoth When a multitool is all that stands between you and, say, a ten-mile walk home, you develop a certain loyalty to the most reliable one.National Geographic Adventure

First Known Use of multi-tool

1985, in the meaning defined above

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The first known use of multi-tool was in 1985

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to reflect, repel, echo, or resound

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