Meaning ofheadroomin English

Noun

1. vertical space above the head
   The car's interior had enough headroom for tall passengers.
2. vertical measurement for clearance (e.g. bridges)
   The engineer measured the headroom under the bridge to ensure safe passage.
3. a system's ability to handle loud sounds (without distortion)
   The audio equipment was designed to provide ample headroom for high-volume music.