A dryer (or drier) most commonly means:
- Hair dryer
- Hand dryer
- Clothes dryer, also known as a tumble-dryer
- Belt dryer
- Cereal dryer, for food preservation
- Desiccant, a substance that absorbs or adsorbs water
- Grain dryer for storage grain bins
- Oil drying agent, an additive which accelerates the film formation of a drying oil