Etymograph

English

full moon

Full moon comes from Middle English ful mone ‘the phase of the moon when in opposition with…’, and goes back to Proto-Germanic *fullaz mēnô.

  1. Proto-Germanicc. 500 BCE–200 CE*fullaz mēnôreconstructed
  2. Old Englishc. 450–1150full mōna
  3. Middle Englishc. 1150–1500ful mone‘the phase of the moon when in opposition with the sun’
  4. Englishearliest quotation 1923full moon

attested reconstructed ? uncertain or disputed

Lineage

  1. Proto-Germanicc. 500 BCE–200 CE*fullaz mēnôreconstructed
  2. Old Englishc. 450–1150full mōna
  3. Middle Englishc. 1150–1500ful mone‘the phase of the moon when in opposition with the sun’
  4. Englishearliest quotation 1923full moon

Earliest quotation: 1923, Lawrence Shaw Mayo, The Shenando’ Valley: “It is true also that the roosters, especially during…”

Formed from full + moon

Proto-Indo-European *pleh₁- ‘to fill’

…

Proto-Germanic *fullaz ‘full’

Proto-West Germanic *full ‘full’

Old English full ‘full’

Middle English ful ‘full’

English full

Proto-Indo-European *mḗh₁n̥s ‘moon’

Proto-Germanic *mēnô

Proto-West Germanic *mānō

Old English mōna

Middle English mone ‘the celestial body closest to the Earth’

English moon

Today it means

noun The phase of the moon when it is in opposition to the sun and its full disc is therefore visible.

Language periods are conventional ranges, not dates for this word.

Etymograph / Proto-Germanic *fullaz mēnô / full moon