1. The act or process of drawing in or carrying along, especially of a fluid or gas being pulled into a flow or current.
Usage: technical; physics/engineering
2. The process by which a moving fluid entrains or incorporates surrounding fluid or particles into its flow.
Usage: technical; fluid dynamics
3. The synchronization of a biological rhythm or process with an external periodic stimulus or environmental cycle.
Usage: technical; biology/chronobiology

Examples

• The entrainments of air bubbles in the water created a foamy mixture.
• Wind tunnel tests measured the entrainments of particles in the jet stream.
• Circadian entrainments help regulate sleep-wake cycles in response to light exposure.
• The pump's design minimizes unwanted entrainments of sediment into the system.
• Biological entrainments synchronize internal clocks with daily environmental changes.