headroom
Longman Dictionary of Contemporary English 5++LDOCE 5++head·room /ˈhed-rʊm, -ruːm/ noun [uncountable] 1. TTCthe amount of space above your head, especially when you are in a car 〔尤指车辆中乘客头顶以上的〕头顶空间2. TTR British English the amount of space above a vehicle when it is under a bridge 〔车顶与桥底之间的〕净空（高度）
Examples from the Corpus
headroom• Once fully open there is 25m headroom above the river's 30m wide navigation channel.• Legroom is generous, and headroom reasonably good.• Quantities of leg and headroom are generous, rearward seat travel in particular, and all-round vision is terrific.• The floor was often dug out by as much as three feet to increase headroom.• This gives the tape more headroom for high frequencies.• Paradoxically, my own company has always given plenty of headroom, but not everyone perceived it thus.• But once they're there, once you've given them headroom, they seem pretty determined to stick around.head·room nounChineseSyllable
space especially above Corpus amount head, when the your of
headroom
head‧room /ˈhed-rʊm, -ruːm/
noun [uncountable]
1. the amount of space above your head, especially when you are in a car
2. British English the amount of space above a vehicle when it is under a bridge
head‧room /ˈhed-rʊm, -ruːm/
noun [uncountable]1. the amount of space above your head, especially when you are in a car
2. British English the amount of space above a vehicle when it is under a bridge