from The American Heritage® Dictionary of the English Language, 4th Edition

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

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • 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

from the GNU version of the Collaborative International Dictionary of English

  • n. See headway, 2.

from The Century Dictionary and Cyclopedia

  • 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.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. vertical space available to allow easy passage under something
  • n. the capacity of a system to reproduce loud sounds without distortion


Sorry, no etymologies found.


  • 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.

    Automotive Headlines

  • -- Wide supply voltage range of +2.5 V to +18 V and rail-to-rail output swing allow for increased headroom, which is critical for audio analog-to-digital converter (ADC) front ends and digital-to-analog converter (DAC) post filters, including TI's PCM42xx and PCM17xx devices.

    ThomasNet News - Today's New Product News

  • Everyone, including people in the third row, get at least 40 inches of headroom, which is unusual. Front Page

  • The A4 is contemporary and sleek, inside and out, without compromise to headroom, which is 40 inches in front with a sunroof.

    Fore, right!

  • That feature helps with headroom, which is tight in back due to the stadium seating that raises rear riders above their front-seat counterparts.

    The Car Connection

  • The trade-off in these four-door coupe crossovers is, naturally, rear headroom, which is sacrificed to the gods of swoopy rooflines.


  • The other major issue they're expected to badger him about is whether the so-called headroom in TARP should be used for any other purpose besides reducing the federal deficit. News

  • Anglo-Australian miner Rio Tinto decision to cut 2009-10 iron ore prices for Nippon Steel Corp and Posco by 33%-44% leaves "headroom" for some spot price increases for Indian iron ore, they said.

    Indian Iron Ore Prices May Move Up on Rio-Nippon Deal

  • This means that the US would come out of the Round on current proposals with "headroom" between its applied and bound rates for agricultural production subsidies.

    The great trade tussle

  • The CRV and the Element offer an amazing amount of headroom which is important to our respective lifestyles.

    поиск для красного элемента


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