1. to board a train
Usage: formal
2. to carry along or sweep up in a current of air or water
Usage: technical
3. to synchronize biological rhythms with external cues
Usage: biology; technical

Examples

• The passengers entrain at the main station.
• We must entrain by 6 AM for the morning departure.
• The wind entrains dust particles from the desert floor.
• The river entrains sediment as it flows downstream.
• Light exposure entrains the body’s circadian rhythm.
• Regular meal times help entrain our internal clock.