say it: ur-AW-ruh
aurora is a noun meaning "the first light of day". It carries 3 recorded senses.
the first light of day
“we got up before dawn”
“they talked until morning”
an atmospheric phenomenon consisting of bands of light caused by charged solar particles following the earth's magnetic lines of force
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for aurora come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.