1. a liquid used to rinse the mouth for cleaning or freshening breath

Examples

• She used mouthwash after brushing her teeth.
• The dentist recommended an antibacterial mouthwash.
• He gargled with mouthwash to freshen his breath.
• The mouthwash had a strong mint flavor.
• Always rinse with mouthwash for thirty seconds.
• The pharmacy sells several brands of mouthwash.