| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
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| firmament |
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| SYLLABICATION: | fir·ma·ment |
| PRONUNCIATION: | fûr m -m nt |
| NOUN: | The vault or expanse of the heavens; the sky. | | ETYMOLOGY: | Middle English, from Old French, from Late Latin firm mentum, from Latin, support, from firm re, to strengthen. See firm2. | | OTHER FORMS: | fir ma·ment al (-m n tl) ADJECTIVE
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| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. |
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