(UK) A person who works with youngsters, to promote informal education.

An unskilled or semiskilled worker who is responsible for running processing machinery in a factory.

(computing) Any of a number of identical tasks in a thread pool pattern

Someone who works for a charitable organisation devoted to helping others, especially one who works internationally or in conflict zones.

A person employed in a household.

Anyone who works in the health sector

(historical) udarnik

Someone who does war work.

A worker with very limited skills and experience in his/her chosen career.

plural of worker-priest