What is Worker?
Worker is (noun) 1. a person who works She’s a good worker. He’s a fast worker. 2. a person who works in a particular job The factory closed when the workers went on strike. Office workers usually work from 9.30 to 5.30. 3. a female bee which goes to find pollen to provide the queen with honey Workers go out of the hive to search for pollen. (NOTE: In a bee colony, the males are called drones.)
source: Easier English, Student Dictionary Upper Intermediate Level