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.

An erection of the penis.

An audio effect that gradually increases in frequency, pitch, or volume.

present tense of rise

Source: wiktionary.org