• synonyms


[self-see-ling, self-]
  1. capable of sealing itself automatically or without the application of adhesive, glue, or moisture: a self-sealing automobile tire; self-sealing envelopes.
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Origin of self-sealing

First recorded in 1920–25
Related formsself-seal·er, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for self-sealing

Historical Examples of self-sealing

  • With the self-sealing lock of the same resistant material, a mere pounding was nothing.

    Acid Bath

    Vaseleos Garson

  • The self-sealing hull was thin magnesium, the outer shell periodically renewed as cosmic sand eroded it.

    Industrial Revolution

    Poul William Anderson

  • If you can get the self-sealing bottles, such as pop or beer comes in, the work of putting up grape juice will be light.

  • Women everywhere should rise and call blessed he who invented the self-sealing jar.

  • Tom gave a yell of triumph and clamped the star point shut, then pushed a button to activate the self-sealing process.

British Dictionary definitions for self-sealing


  1. (esp of an envelope) designed to become sealed with the application of pressure only
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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