headroom

or head room

[ hed-room, -roo m ]
/ ˈhɛdˌrum, -ˌrʊm /

noun

Nautical. the clear space between two decks.
Also called headway.
  1. clear vertical space, as between the head and sill of a doorway, the ceiling and floor of a room, or the ceiling of a vehicular passageway and a vehicle roof, as to allow passage or comfortable occupancy: over 7.5 feet of headroom in the attic; a covered bridge with limited headroom.
  2. clear vertical space above one’s head, as in a vehicle or room: plenty of headroom for passengers.

Origin of headroom

First recorded in 1850–55; head + room

Example sentences from the Web for headroom

British Dictionary definitions for headroom

headroom

headway

/ (ˈhɛdˌrʊm, -ˌruːm) /

noun

the height of a bridge, room, etc; clearance