Half back, traditionally, refers to a position in rugby and football. However, the term has several synonyms across fields. In American football, the half back is commonly referred to as the running back. Similarly, in field hockey, the half back is often called the defensive midfielder. In theatre, half back can also mean the back of the stage. In photography, the term half back can also refer to a type of lighting technique where the light is placed behind the subject. Finally, half back can mean the split stage in a carriage or train, often called the guard's van or brake van. The term half back is versatile and can hold different meanings, depending on the context and the field.