coalsack.
A sack for carrying coal.
Meaning & usage
A sack for carrying coal.
Any of the spaces in the Milky Way which are very black, owing to the nearly complete absence of stars.
Where this word comes from
From coal + sack.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.