What is the meaning of Riser?

Someone or something which rises.

A platform or stand used to lift or elevate something.

A vertical part of a step on a staircase.

The main body of a bow.

A vertical utility conduit, pipe or path between floors of a building for placement of cables (e.g. telephone, networking), or to convey fluids (e.g. gas, water).

A pipe connecting an individual exhaust port of an internal combustion engine to the muffler, particularly on aircraft.

A Manx cat with a showable short tail.

A strip of webbing joining a parachute's harness to the rigging lines.

a reservoir built into a metal casting mold to prevent the formation of cavities in the casting as the metal shrinks on cooling.

A male's erection.

present tense of rise

Source: wiktionary.org