Definition of rappers:
(n) :
(music) A performer of rap music, or someone who raps in any form of music.
(n) :
One who, or that which, raps or knocks.
(n) :
The knocker of a door.
(n) :
A mechanical, or later electric, signalling device formerly used in the mines of north-eastern England to signal to the engineman that the cages carrying men or coals up and down the shaft were ready to be raised or lowered.
(n) :
A flexible strip of metal, 45-60cm long, with handles at each end, used for Northumbrian rapper sword dancing.
(n) :
A spiritualistic medium who claims to receive communications from spirits in the form of knocking sounds.