1. to prepare something for winter weather conditions

Examples

• We need to winterize our house before the cold weather arrives.
• The mechanic will winterize your car by checking the antifreeze and battery.
• Don’t forget to winterize the outdoor water pipes to prevent freezing.
• The marina offers services to winterize boats for storage.
• They winterized their vacation cabin by draining all the water lines.
• It’s important to winterize your lawn mower before putting it away for the season.