aurora

noun au·ro·ra \ ə-ˈrȯr-ə , ȯ- \
|Updated on: 5 Jun 2018
plural auroras or aurorae play \-(ˌ)ē\
1 : dawn
2 capitalized : the Roman goddess of dawn — compare eos
3 : a luminous phenomenon that consists of streamers or arches of light appearing in the upper atmosphere of a planet's magnetic polar regions and is caused by the emission of light from atoms excited by electrons accelerated along the planet's magnetic field lines

auroral

play \-əl\ adjective

aurorean

play \-ē-ən\ adjective

Examples of aurora in a Sentence

  1. a gorgeous pink aurora aroused us out of our slumber

Recent Examples of aurora from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'aurora.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of aurora

Latin — more at east

Aurora

geographical name Au·ro·ra \ ə-ˈrȯr-ə , ȯ- \
1 city in north central Colorado east of Denver population 325,078
2 city west of Chicago in northeastern Illinois population 197,899
3 town north of Toronto in southeastern Ontario, Canada population 53,203

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