Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

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

from The Century Dictionary.

  • noun 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.
  • noun 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 the GNU version of the Collaborative International Dictionary of English.

  • noun (Arch.), Mostly Brit. See headway, 2.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun the vertical clearance above someone's head, as in a tunnel, doorway etc
  • noun electronics the ability of a system to reproduce loud sounds free of distortion; dynamic headroom
  • noun the distance between the actual performance of an algorithm to its maximum possible performance

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

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

Etymologies

Sorry, no etymologies found.

Examples

  • 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

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

    KansasCity.com: Front Page

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

    KansasCity.com: Front Page

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

    The Herald | HeraldOnline.com - Front

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

    The Herald | HeraldOnline.com - Front

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

    SFGate: Top News Stories

  • -- 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.

    KansasCity.com: Front Page

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

    Home

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

    Las Vegas News - LasVegasNOW.com

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