: a simple machine of the inclined plane type consisting of a spirally grooved solid cylinder and a correspondingly grooved hollow cylinder into which it fits
b
: a nail-shaped or rod-shaped piece with a spiral groove and a slotted or recessed head designed to be inserted into material by rotating (as with a screwdriver) and used for fastening pieces of solid material together
Verb I screwed the boards together. The cupboards are screwed to the wall. Screw the cap on tight.Screw the light bulb into the fixture. The lid screws onto the jar. The light bulb screws right in. See More
Word History
Etymology
Noun
Middle English scrue, from Middle French escroe female screw, nut, from Medieval Latin scrofa, from Latin, sow