head room

headroom

[hed-room, -room]
noun
1.
Nautical. the clear space between two decks.
2.
Also called headway.
a.
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.
b.
clear vertical space above one’s head, as in a vehicle or room: plenty of headroom for passengers.
3.
Also, head room.


Origin:
1850–55; head + room

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
headroom or headway (ˈhɛdˌrʊm, -ˌruːm)
 
n
the height of a bridge, room, etc; clearance
 
headway or headway
 
n

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