We don't have any synonyms for elve yet.
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Definition of elve:
(n) :
(astronomy, meteorology) A rapidly expanding disk-shaped region of red luminosity in the ionosphere, lasting less than a thousandth of a second, which occurs high above energetic cloud-to-ground lightning of positive or negative polarity.
(n) :
Obsolete form of elf. [(Germanic mythology) A supernatural being or spirit associated with illness, mischief, and harmful or dangerous magical influence; in later Norse sources, sometimes divided into benevolent light elves (inhabiting Álfheimr) and malevolent dark elves.]