This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. Space above one's head, as in a motor vehicle, above a doorway, or in a tunnel; clearance.

n. Electronics Dynamic headroom.

n. the vertical clearance above someone's head, as in a tunnel, doorway etc

n. the ability of a system to reproduce loud sounds free of distortion; dynamic headroom

n. the distance between the actual performance of an algorithm to its maximum possible performance

n. See headway, 2.

n. The vertical distance from a floor to the ceiling or beams above it: so named because this distance determines whether or not a person has room for his head when standing or walking on the floor.

n. Specifically, the space left above a stair by means of which the head of the person ascending the stair is kept free from striking or coming too near the superstructure.

n. vertical space available to allow easy passage under something

n. the capacity of a system to reproduce loud sounds without distortion

"PERFORMANCE: In a luxury car, power is less about maximum speed and acceleration than the equivalent to what audiophiles call "headroom" - the capacity to deal instantly and effortlessly with any demand on the system."

elbowroom    way    room    hifi    high fidelity   

headway   

bedroom   

config-if)#    never-before-played    vsftpd    systemwide    home-equity    elbowroom    dryland    quake-hit    andother    fortun