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ENGLISH · A WORD WITH POSSIBILITIES

penumbra.

A partially shaded area around the edges of a shadow, especially an eclipse.

8 characters3 syllables approx.English language

Meaning & usage

noun/pəˈnʌm.bɹə/
  1. A partially shaded area around the edges of a shadow, especially an eclipse.

  2. A region around the edge of a sunspot, darker than the sun's surface but lighter than the middle of the sunspot.

  3. An area of uncertainty or intermediacy between two mutually exclusive states or categories.

    figuratively
  4. An area that lies on the edge of something; a fringe.

    figuratively
  5. Something related to, connected to, and implied by, the existence of something else that is necessary for the second thing to be full and complete in its essential aspects.

  6. A region of the brain that has lost only some of its blood supply, and retains structural integrity but has lost function.

Where this word comes from

From New Latin pēnumbra, from Latin paene (“almost”) + umbra (“shadow”).

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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.