[ gley-sis, glas-is ]
/ ˈgleɪ sɪs, ˈglæs ɪs /

noun, plural gla·cis [gley-seez, -siz, glas-eez, -iz] /ˈgleɪ siz, -sɪz, ˈglæs iz, -ɪz/, gla·cis·es.

a gentle slope.
Fortification. a bank of earth in front of the counterscarp or covered way of a fort, having an easy slope toward the field or open country.

Nearby words

  1. glacier peak,
  2. glacier table,
  3. glaciological,
  4. glaciologist,
  5. glaciology,
  6. glacis plate,
  7. glackens,
  8. glackens, william james,
  9. glacé,
  10. glad

Origin of glacis

1665–75; < Middle French; akin to Old French glacier to slide; compare Latin glaciāre to make into ice; see glacé Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for glacis

British Dictionary definitions for glacis


/ (ˈɡlæsɪs, ˈɡlæsɪ, ˈɡleɪ-) /

noun plural -ises or -is (-iːz, -ɪz)

a slight incline; slope
an open slope in front of a fortified place
short for glacis plate

Word Origin for glacis

C17: from French, from Old French glacier to freeze, slip, from Latin glaciāre, from glaciēs ice

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 glacis



"sloping bank" (especially leading up to a fortification), 1670s, from French glacir "to freeze, make slippery," from Old French glacier "to slip, glide," from Vulgar Latin *glaciare "to make or turn into ice," from glacies (see glacial).

Online Etymology Dictionary, © 2010 Douglas Harper