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Definition of supermoon

supermoon

/ˈsuːpərˌmuːn/
su · per · moon
Plural:supermoons
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supermoon Lexical Profile

supermoon Game Scores & Validity

• noun

1

A full moon or new moon that nearly coincides with perigee—the closest point that the Moon comes to the Earth in its elliptic orbit—resulting in a slightly larger-than-usual apparent size and increased brightness of the lunar disk as viewed from Earth.

Example

"Stargazers gathered on the hilltop to photograph the glowing supermoon as it rose above the horizon."

Antonyms
View all antonyms for supermoon

Word Nuance & Usage

Although widely used in popular media, "supermoon" originated in astrology; astronomers formally refer to this phenomenon as a "perigee-syzygy" or "perigee full moon."

• Nearby Words

supermax
supermodel
supermom
supermoon
supernatural
supernaturally
supernormal

Word Origin & Etymology

Coined in 1979 by American astrologer Richard Nolle from the prefix "super-" and "moon" to describe a full or new moon occurring within 90 percent of its closest approach to Earth.

Cite this Entry

Wordmom. (2026). Definition of Supermoon. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/supermoon
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