What is the meaning of Worker?

One who works: a person who performs labor for a living; traditionally, especially, manual labor.

A nonreproductive social insect, such as ant, bee, termite, or wasp.

  1. A female ant, bee, termite or wasp.

A female ant, bee, termite or wasp.

A thread performing one instance of a particular task within a program.

Source: wiktionary.org