Pronunciation: (un-skrOO'), [key]
1. to draw or loosen a screw from (a hinge, bracket, etc.).
2. to unfasten or withdraw by turning, as a screw or lid.
3. to open (a jar, bottle, etc.) by turning the lid or cover.
to permit of being unscrewed.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.