0 the amount of space below a roof, ceiling, or bridge, or below the top of something:
1 opportunity for doing something, especially opportunity to develop, progress, or grow:
2 the space above your head when you are inside something, esp. a car or other vehicle:
For rear passengers there is plenty of width but not much headroom.
With this type of loft conversion there will be less headroom, as the slope of the roof is retained in the conversion.
The builders of the M6 in the 1960s did not leave enough headroom for boats to go under the motorway.
Pack the cucumbers into the canning jars, then cover with hot brine leaving 1/2 inch of headroom.
I think it's important to challenge yourself and take on roles that have got some headroom for personal development.
Although online advertising is growing slowly, there is still considerable headroom for the company to grow its revenues.
If their other costs are going up there's clearly less headroom to subsidize affordable homes.