umbra

1 a time or place of little or no light strange noises were coming from the wooded umbra beyond our campfire Synonyms black, blackness, candlelight, darkness, dusk, gloaming, gloom, murk, night, semidarkness, shade, shadows, twilight, darkRelated Words midnight; blackout, brownout, dimout; shadiness, umbrage; dullness (also dulness), somberness; cloudiness, fogginess, haziness, mistiness, murkiness; dimness, faintness, gloominess, grayness, paleness; half-lightNear Antonyms moonlight, starlight, sunlight; effulgence, radiance, radiancy, shine, sunshine; incandescence, luminance, luminescence, luminosity, luminousnessAntonyms blaze, brightness, brilliance, day, daylight, glare, glow, light, lightness

2 partial darkness due to the obstruction of light rays during a solar eclipse observers located within the umbra experience a complete blocking of the sun by the moon Synonyms dusk, penumbra, shadiness, shadow, shadeRelated Words blackness, dimness, duskiness, gloom, gloominess, murkiness, obscurity, semidarkness, somberness; cloudinessNear Antonyms brightness, brilliance, effulgence, illumination, incandescence, light, lightness, lucidity, lucidness, luminance, luminosity, luminousness, radiance, radiancy