A personal trainer who guides another person in developing physical fitness.

An animal trainer who trains animals for obedience, tricks and work.

A type of athletic shoe.

A bicycle trainer device that attaches to a bicycle and makes it stationary for indoor training.

Trainer, Pennsylvania, a borough in Pennsylvania, United States

An aircraft trainer used for training pilots.

An athletic trainer who provides medical assistance to athletes or other physically active individuals.

The river and municipality in Schleswig-Holstein in Germany is spelled Treene.

A horse trainer responsible for preparing a horse for races.

An instructor in a business context.

Trainer (games) – Games software for computer and video games that adds in extra options, usually to make the game easier.