Gaffer (noun)

1. A chief electrician on a film set or in a theater, responsible for the design and execution of the lighting plan.
2. A person who is in charge of a group or work crew, especially in a manual or industrial setting.
3. A British term for a foreman or boss in a factory or shipyard.

Origin:

The word gaffer has its roots in the old english word 'gafere,' which was used to refer to an elderly man or the master of a household.

Examples:

1. The gaffer was in charge of lighting on the set of the film.
2. The construction gaffer made sure that all the workers were following safety regulations.
3. The gaffer on the shipyard oversaw the repair of the damaged vessel.
4. The gaffer at the factory was responsible for ensuring that production was running smoothly.
5. The gaffer of the theater lighting crew designed a lighting plan that perfectly complemented the play.