firmament

[ fur-muh-muh nt ]
/ ˈfɜr mə mənt /

noun

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

OTHER WORDS FROM firmament

fir·ma·men·tal [fur-muh-men-tl] /ˌfɜr məˈmɛn tl/, adjective

Example sentences from the Web for firmament

British Dictionary definitions for firmament

firmament
/ (ˈfɜːməmənt) /

noun

the expanse of the sky; heavens

Derived forms of firmament

firmamental (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