[ fur-muh-muh nt ]
/ ˈfɜr mə mənt /


the vault of heaven; sky.


Nearby words

  1. firing pin,
  2. firing range,
  3. firing squad,
  4. firkin,
  5. firm,
  6. firmamental,
  7. firman,
  8. firmer chisel,
  9. firmer gouge,
  10. firmware

Origin of firmament

1250–1300; Middle English < Late Latin firmāmentum sky, Latin: support, prop, stay, equivalent to firmā(re) to strengthen, support (see firm2) + -mentum -ment

Related formsfir·ma·men·tal [fur-muh-men-tl] /ˌfɜr məˈmɛn tl/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for firmament

British Dictionary definitions for firmament


/ (ˈfɜːməmənt) /


the expanse of the sky; heavens
Derived Formsfirmamental (ˌfɜːməˈmɛntəl), adjective

Word Origin for firmament

C13: from Late Latin firmāmentum sky (considered as fixed above the earth), from Latin: prop, support, from firmāre to make firm 1

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 firmament



mid-13c., from Latin firmamentum "firmament," literally "a support or strengthening," from firmus "firm" (see firm (adj.)), used in Vulgate to translate Greek stereoma "firm or solid structure," which translated Hebrew raqia, a word used of both the vault of the sky and the floor of the earth in the Old Testament, probably literally "expanse," from raqa "to spread out," but in Syriac meaning "to make firm or solid," hence the erroneous translation.

Online Etymology Dictionary, © 2010 Douglas Harper