| demi-finale | semifinal |
| demi-finaliste | semifinalist |
| Demi-fond | Middle distance track event |
| demi-frère | half brother |
| Demi-grand axe | Semi-major axis |
| demi-hectare | acre |
| Demi-heure | Half an hour |
| demi-jour | half-light |
| demi-lune | half moon |
| demi-monde | demimonde |
| Demi-mots | Flower |
| Demi-once | Lot |
| demi-saison | in-between season |
| Demi-sec | Medium dry |
| demi-solde | half pay |
| demi-sœur | half sister |
| Demi-tarif | Half-fare |
| demi-ton | semitone |
| demi-tour | about-face |
| demi-vie | half-life |
| Demi-vie radioactive | Half-life |
| demi-volée | half-volley |
