verb (used with object), un·stopped, un·stop·ping.

to remove the stopper from: to unstop a bottle.
to free from any obstruction; open: to unstop a sewer.
to draw out the stops of (an organ).

Origin of unstop

First recorded in 1350–1400, unstop is from the Middle English word unstoppen. See un-2, stop
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unstopped

Historical Examples of unstopped

  • It was not difficult for him to hear through the unstopped logs.

  • If the bottle be stopped, the colour will disappear; but when unstopped, it will return.

  • Then shall the eyes of the blind be opened, and the ears of the deaf shall be unstopped.

  • He unstopped his canteen and pressed the nozzle to Manners' lips.

    Aladdin O'Brien

    Gouverneur Morris

  • He rose as before with alacrity, rung his bell in reply, and unstopped his needle.

    The Iron Horse

    R.M. Ballantyne

British Dictionary definitions for unstopped



not obstructed or stopped up
phonetics denoting a speech sound for whose articulation the closure is not complete, as in the pronunciation of a vowel, fricative, or continuant
prosody (of verse) having the sense of the line carried over into the next
(of an organ pipe or a string on a musical instrument) not stopped


verb -stops, -stopping or -stopped (tr)

to remove the stop or stopper from
to free from any stoppage or obstruction; open
to draw out the stops on (an organ)
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