drone >> /droʊn/
Definition: [intransitive verb] Make a continuous low humming sound.
Example: in the far distance a machine droned
Definition: [noun] A low continuous humming sound.
Example: he nodded off to the drone of the car engine
Definition: [noun] A continuous musical note of low pitch.
Example: the drone rose by a third to A
Definition: [noun] A male bee in a colony of social bees, which does no work but can fertilize a queen.
Example: According to scientific descriptions, a honeybee colony consists of one queen, several thousand worker bees, and at certain times of the year, a few to several thousand drones, or male bees.
Definition: [noun] A remote-controlled pilotless aircraft or small flying device.
Example: pilots use remote controls to guide a stealth reconnaissance drone