1. past tense of churn; to stir or agitate vigorously
2. past tense of churn; to make butter by stirring cream
3. past tense of churn; to move in a turbulent or violent manner

Examples

• The storm churned the ocean waves into white foam.
• She churned butter from fresh cream every morning.
• His stomach churned with nervousness before the exam.
• The factory churned out hundreds of products daily.
• The washing machine churned loudly during the spin cycle.
• The author churned out three novels in one year.
• Dark clouds churned overhead before the thunderstorm.