1.Definition: a member of the working class (not necessarily employed)

"Workers of the world--unite!"

Related Noun(s):prole, proletarian

Category: People

2.Definition: a person who acts and gets things done

"He's a principal actor in this affair", "When you want something done get a doer", "He's a miracle worker"

Related Noun(s):actor, doer

Category: People

3.Definition: a person who works at a specific occupation

"He is a good worker"

Category: People

4.Definition: sterile member of a colony of social insects that forages for food and cares for the larvae

Category: Animals