What does "firmament" mean?
The vault of the heavens, where the clouds, sun, moon, and stars can be seen; the heavens, the sky.
Firmament
/ˈfɜːməm(ə)nt/ noun
noun ·Moderate ·College level
Meaning at a glance
- Primary sense: The vault of the heavens, where the clouds, sun, moon, and stars can be seen; the heavens, the sky.
- Grammar: firmament is listed as noun.
- Nearest alternatives: celestial sphere, heavens, vault of heaven, air.
- Useful contrasts: earth, earthly realm, ground.
- Usage evidence: May the firmament not fall upon him.
How to use "firmament"
- Start with the primary definition, then check the part of speech before placing the word in a sentence.
- Compare nearby synonyms to make sure "firmament" carries the exact meaning, tone, and strength you need.
- Use the example sentence as a context check. If your sentence uses the word differently, confirm that the grammar still fits.
Meaning check
- Does the word fit the sentence's grammar?
- Does it match the intended tone rather than only the dictionary definition?
- Would a simpler synonym be clearer for the reader?
- Is there enough surrounding context to prevent ambiguity?
Source and review context
This entry combines structured lexical data with WordToolSet review checks. Definitions, examples, synonyms, and usage notes may come from different source tables, so the page is designed to show evidence from more than one angle before you rely on "firmament" in a final draft.
If a word has several senses, prefer the sense that matches your sentence's grammar and surrounding context. A correct definition can still be the wrong choice when the sentence needs a different register, emphasis, or level of specificity.
Before you rely on this definition
Read the first definition as a starting point, then check the example, synonyms, and part of speech before treating "firmament" as the right word for your sentence.
If your draft is formal, technical, persuasive, or sensitive, compare "firmament" with a nearby alternative so the final choice matches both meaning and reader expectation.
Compare nearby meanings
- Use synonyms when you need a softer, stronger, simpler, or more specific word.
- Use antonyms to check the boundary of the meaning and avoid accidental contrast.
- Use the example sentence to confirm the word behaves naturally in context.
- Keep the original wording when a replacement adds complexity without improving precision.
Definition decision workflow
1. Identify the role
Check whether "firmament" is acting as noun in your sentence. A definition is only useful when the grammar matches the way the word is being used.
2. Test the nearest option
Compare it with "celestial sphere" and other nearby choices to see whether the sentence needs a softer, stronger, or more familiar word.
3. Confirm with context
Use the example sentence below as an evidence check, then read your own sentence out loud to catch tone or rhythm problems.
Review note: Definition pages are checked for source coverage, sentence evidence, synonym support, and editorial insight before they are treated as approval-ready pages. If the evidence is too thin, the page remains available to users but is kept out of the approval-facing indexed inventory.
Final meaning check
Before publishing a sentence with "firmament", ask whether the word helps the reader understand the idea faster. A precise word should reduce confusion, not simply make the sentence look more polished.
When the definition, synonym evidence, and example context point in the same direction, the word is usually a safer choice. When they conflict, revise the sentence or choose a clearer alternative.
Definitions
Noun
- 1 The vault of the heavens, where the clouds, sun, moon, and stars can be seen; the heavens, the sky. also, figuratively, literary, poetic, uncountable, usually
"And thei that be wiſe, ſhal ſhine, as the brightnes of the firmament: & they that turne to righteouſnes, ſhal ſhine as the ſtarres, for euer and euer."
- 2 the apparent surface of the imaginary sphere on which celestial bodies appear to be projected wordnet
- 3 The field or sphere of an activity or interest. countable
"the international fashion firmament"
- 4 In the geocentric Ptolemaic system, the eighth celestial sphere which carried the fixed stars; (countable, by extension) any celestial sphere. historical, uncountable
"[B]etweene the ſphere of Saturne and the Firmament, there is ſuch an incredible and vaſt ſpace or diſtance (7000000. ſemidiameters of the earth, as Tycho [Brahe] calculates) void of ſtarres: [...]"
- 5 The abode of God and the angels; heaven. uncountable
"Praiſe ye the Lord. Praiſe God in his Sanctuarie: Praiſe him in the firmament of his power."
Show 3 more definitions
- 6 A piece of jewellery worn in a headdress with numerous gems resembling stars in the sky. countable, obsolete
"Pins tipt with Diamond Point, and head, / By which the Curls are faſtened, / In radiant Firmament ſet out, / And all over the Hood ſur-tout: [...]"
- 7 A basis or foundation; a support. also, countable, figuratively, obsolete
"Ten years ago, the Wall Street wirehouse brokerage firm seemed unassailable – part of the very firmament underpinning the entire investment industry from coast to coast."
- 8 The act or process of making firm or strengthening. countable, obsolete
Synonyms
All synonymsExample
"May the firmament not fall upon him."
Common questions
What is a synonym for "firmament"?
Common synonyms include: celestial sphere, heavens, vault of heaven, air, astral, azure.
How do you use "firmament" in a sentence?
May the firmament not fall upon him.
How do you pronounce "firmament"?
Pronounced /ˈfɜːməm(ə)nt/.
Etymology
From Middle English firmament, furmament (“heaven; sky”), from Old French firmament (“firmament”), or from its etymon Latin firmāmentum (“support; sky”), from firmāre (“to strengthen”) + -mentum (suffix indicating an instrument or medium, or the result of an action). Firmāre is the present active infinitive of firmō (“to make firm, strengthen”), from firmus (“firm, strong, stable”), ultimately from Proto-Indo-European *dʰer- (“to hold; to support”). The Latin word was used in the Vulgate version of the Bible to translate the Ancient Greek στερέωμα (steréōma, “foundation, framework; firmament”) in the Septuagint (Greek Old Testament), which in turn was used to translate the Hebrew רָקִיעַ (rāqī́aʿ, “celestial dome, vault of heaven”), from the root ר־ק־ע (r-q-`); in Classical Syriac the similar root ܪ ܩ ܥ (related to compacting) gave rise to ܪܩܝܥܐ (rəqīʿā, “compact; firm; firmament, heavens, sky; celestial sphere”).