[ see-luh nt ]
/ ˈsi lənt /


a substance used for sealing, as sealing wax or adhesives.
any of various liquids, paints, chemicals, or soft substances that may be applied to a surface or circulated through a system of pipes or the like, drying to form a hard, watertight coating.
Dentistry. any of several transparent synthetic resins applied to the chewing surfaces of molars and premolars in young children and teenagers as a preventive measure against tooth decay in the occlusal pits and fissures.

Nearby words

  1. seal one's fate,
  2. seal point,
  3. seal ring,
  4. seal-point,
  5. sealab,
  6. sealchie,
  7. sealed,
  8. sealed book,
  9. sealed move,
  10. sealed orders

Origin of sealant

1940–45; seal1 + -ant, probably by analogy with coolant Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sealant

British Dictionary definitions for sealant


/ (ˈsiːlənt) /


any substance, such as wax, used for sealing documents, bottles, etc
any of a number of substances used for stopping leaks, waterproofing wood, etc
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

Word Origin and History for sealant



1945, from seal (v.) + -ant.

Online Etymology Dictionary, © 2010 Douglas Harper