[ air-gloh ]

  1. a dim light from the upper atmosphere caused by emissions from atoms and molecules ionized by solar radiation: observed at night (nightglow ), during the day (dayglow ), and at twilight (twilight glow ), with each having slightly different characteristics.

Origin of airglow

First recorded in 1950–55; air1 + glow

Words Nearby airglow Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

British Dictionary definitions for airglow


/ (ˈɛəˌɡləʊ) /

  1. the faint light from the upper atmosphere in the night sky, esp in low latitudes

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for airglow


[ ârglō′ ]

  1. A faint photochemical luminescence in the upper atmosphere caused by the collision of x-rays and charged particles from the Sun with atoms and molecules, especially of oxygen, sodium, and the hydroxyl radical (OH). Airglow is strongest over low and middle latitudes.

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