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[uhn-skroo] /ʌnˈskru/
verb (used with object)
to draw or loosen a screw from (a hinge, bracket, etc.).
to unfasten or withdraw by turning, as a screw or lid.
to open (a jar, bottle, etc.) by turning the lid or cover.
verb (used without object)
to permit of being unscrewed.
Origin of unscrew
1595-1605; un-2 + screw Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for unscrew
  • unscrew the valve from the scuba tank with a wrench.
  • unscrew it with a coin and you can replace with a bigger grip, or none at all.
  • Position a catch tub under the oil pan and unscrew the drain plug.
  • unscrew a light bulb that uses a lot of electricity and replace it with one that uses much less.
  • And don't be too cheap to unscrew the water bottles in your room.
  • When you are done, unscrew the syringe and put it in your sharps container.
  • Owners of the recalled cribs, are urged to unscrew the four corner posts immediately.
  • Do not unscrew the light bulb right after turning off the lamp as the bulb may be hot and can burn you.
  • Raccoons have learned how to work toggles and zippers, and can unscrew containers.
  • Imagine that you are trying to unscrew the top of a jelly jar.
British Dictionary definitions for unscrew


(transitive) to draw or remove a screw from (an object)
(transitive) to loosen (a screw, lid, etc) by rotating continuously, usually in an anticlockwise direction
(intransitive) (esp of an engaged threaded part) to become loosened or separated: the lid wouldn't unscrew
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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