- Architecture A half-circle window, often with sash bars arranged like the ribs of a fan.【建筑学】 扇形窗：门或窗上有扇骨状放射格条的半圆形窗
- Chiefly British A transom.【多用于英国】 气窗
- freeborn
- free central placentation
- free city
- freed
- Freed-Hardeman University
- freedman
- freedmen
- freedom
- freedom fighter
- freedom march
- freedom of the seas
- freedom rider
- freedoms
- freedwoman
- freedwomen
- free energy
- free enterprise
- free fall
- free-fire zone
- free flight
- free-floating
- free-for-all
- freeform
- free form
- freehand