1 [with adjective] a person who habitually gets out of bed at a particular time of the morning:late risers always exasperate early risers
2a vertical section between the treads of a staircase:make risers low and treads deep
3a vertical pipe for the upward flow of liquid or gas:this pressure carries water through the risers to the upper floorsthe main gas riser there was relocated
4a low platform on a stage or in an auditorium, used to give greater prominence to a speaker or performer:he fell backwards off the riserhalf a drum riser collapsed during my solo
5a strip of webbing joining the harness and the rigging lines of a parachute or paraglider:constantly adjust the risers to keep the wing overhead
