Definition of demi- in English:

demi-

prefix

  • 1Half; half-size.

    ‘demisemiquaver’
    ‘demitasse’
  • 2Partially; in an inferior degree.

    ‘demigod’
    ‘demimonde’
    incomplete, partial, half, semi-, demi-, near, moderate, limited, slight, inadequate, insufficient, unfinished
    View synonyms

Origin

Via French from medieval Latin dimedius ‘half’, from earlier dimidius.

Pronunciation

demi-

/ˈdemē//ˈdɛmi/