[hed-room, -roo
m] 
| 1. | Nautical. the clear space between two decks. |
| 2. | Also called headway. clear vertical space, as between the head and sill of a doorway or between the ceiling and floor of an attic room at a certain point, esp. such height as to allow passage or comfortable occupancy. |
| 3. | Audio. dynamic headroom. |
| the additional power output capability of an amplifier when producing short-term peak signals, compared with its continuous-signal power rating. |
| head·room (hěd'rōōm', -rŏŏm') n.
|