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Headway
//ˈhɛdweɪ// noun
Definitions
Noun
- 1 Movement ahead or forward. countable, uncountable
- 2 forward movement wordnet
- 3 Forward motion, or its rate. countable, uncountable
- 4 vertical space available to allow easy passage under something wordnet
- 5 The interval of time or distance between the fronts of two vehicles (e.g. buses) moving in succession in the same direction, especially along the same pre-determined route. countable
"The whole of the main lines to be electrified were being equipped with four-aspect colour-light signals, automatically operated, where appropriate, and spaced to give a 5min headway throughout."
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- 6 Progress toward a goal. figuratively, uncountable
- 7 The clearance beneath an object, such as an arch, ceiling or bridge; headroom. countable
"So as not to impede navigation the two principal spans of the bridge were designed to provide a clear headway of 157 ft. above high water for a distance of 500 ft.; [...]."
- 8 A crossheading. countable, uncountable
Etymology
Partly from Middle English hauedwei, from Old English hēafodweġ (“head-road, main-road”); partly as a shortening of ahead-way, the source of the nautical sense. By surface analysis, head + way.
See also for "headway"
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