1. past tense and past participle of alternate; to occur or do in turns; to switch back and forth between two or more things

Examples

• The students alternated reading paragraphs aloud.
• She alternated between feeling excited and nervous about the interview.
• The traffic light alternated between red and green.
• They alternated driving duties on the long road trip.
• The weather alternated between sunny and rainy all week.
• The coach alternated the starting lineup each game.