■ noun
1》 a person who habitually gets out of bed at a particular time of the morning: an early ~.
2》 a vertical section between the treads of a staircase.
3》 a vertical pipe for the upward flow of liquid or gas.
4》 a low platform on a stage or in an auditorium.
5》 a strip of webbing joining the harness and the rigging lines of a parachute or paraglider.