n.1. a. One who works at a particular occupation or activity: an office worker.
b. One who does manual or industrial labor.
2. A member of the working class.
3. A member of a colony of social insects such as ants, bees, wasps, or termites, usually a sterile or sexually immature female but in termites an individual of either sex, that performs specialized work such as building the nest, collecting and storing food, and feeding other members of the colony.