a hand tool for driving screws; has a tip that fits into the head of a screw
"I used an old screwdriver to tighten the loose hinge on my desk chair."
a cocktail made with vodka and orange juice
"After work, I ordered a screwdriver at the bar to unwind from my long shift."
A hand or machine tool which engages with the head of a screw and allows torque to be applied to turn the screw, thus driving it in or loosening it.
"He picked up his screwdriver from the workbench to tighten the loose hinge on the cabinet door."
The word "screwdriver" is a compound formed from "screw" and "driver." It originally referred to a tool used to turn screws.