[fur-muh-muh nt]


the vault of heaven; sky.

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

Related Words for firmament

lid, empyrean, sky, welkin, vault

Examples from the Web for firmament

Contemporary Examples of firmament

Historical Examples of firmament

  • But now came a cloud which swallowed every other in my firmament.

    Wilfrid Cumbermede

    George MacDonald

  • The troop of the stars was posted in the immeasurable deeps of the firmament.

    A Spirit in Prison

    Robert Hichens

  • In the great days, presentiments hover before me in the firmament.

    Essays, First Series

    Ralph Waldo Emerson

  • In all the firmament of poetry there was no star to outshine his.

    William Shakespeare

    Samuel Levy Bensusan

  • The firmament rang with laughter as the other candidates panted up.

British Dictionary definitions for firmament



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