Found 2 items, similar to headroom.
English → English (WordNet) Definition: headroom headroom n 1: vertical space available to allow easy passage under something [syn: headway, clearance] 2: the capacity of a system to reproduce loud sounds without distortion [syn: dynamic headroom]
English → English (gcide) Definition: Headroom Headroom \Head"room`\ (-r[=oo]m`), n. (Arch.) See Headway, 2. [Mostly Brit.] [1913 Webster +PJC]