Drone

Drone can mean:

In nature:

In vehicles:

A unmanned aerial vehicle, often used for target practice or surveillance
A remotely operated vehicle (ROV), used for mine clearing or underwater exploration
An unmanned ground vehicle (UGV), a robotic land vehicle often used to replace humans in hazardous situations

In fiction:

Drone (2017 film)
A member of the Drones Club in P. G. Wodehouse's novels
A humanoid that has been assimilated by the Borg in the fictional Star Trek universe
"Drone" (Voyager episode), an episode of Star Trek: Voyager
Drone Weapon, similar to a guided missile, in the Stargate universe
Three robotic helpers in the movie Silent Running, named Huey, Dewey and Louie
In the novel The Traveller, the term drones describes a class of citizens that have become exhausted
Detective Drone, the hero of Victorian crime stories
A Zerg worker unit in Starcraft

In music:

Drone (music), a continuous note or chord
The part of various musical instruments (such as the bagpipe) that produce the drone sound
A bumbass, a folk instrument sometimes called a drone
Drone music, a music style or genre related to background music and ambient music
Drone Records, a record label
"Drones," a song by Rise Against
The Drones, a rock group from Melbourne, Australia