Read the dictionary definition of worker. All definitions for this word.
1. sterile member of a colony of social insects that forages for food and cares for the larvae
2. a person who works at a specific occupation
1. he is a good worker
3. a person who acts and gets things done
1. he's a principal actor in this affair
2. when you want something done get a doer
3. he's a miracle worker
4. a member of the working class (not necessarily employed)
1. workers of the world--unite!