1. a preliminary wash or cleaning before the main washing process

1. to wash or clean something before the main washing process

Examples

• The washing machine has a prewash cycle for heavily soiled clothes.
• I always do a prewash on stained garments before the regular cycle.
• The prewash setting uses less water and detergent.
• You should prewash those muddy soccer uniforms.
• She decided to prewash the tablecloth to remove the wine stain.
• The delicate fabrics require a gentle prewash treatment.
• Most modern washers include an automatic prewash option.