footroom noun2 •Space for a person's feet, especially while seated.Drivers say there's insufficient footroom; the brake and accelerator pedals are mounted too close to each other; narrow, poorly cushioned seats lack sufficient thigh support; […] — 2012 •Extra bandwidth for lower-than-expected values.[…] the difference between signal-to-noise ratio and overload reserve (headroom) as well as noise (safety) margin (footroom). — 2000
