1. a cosmetic product used to hide blemishes, dark circles, or other imperfections on the skin
2. a person or thing that hides or covers something

Examples

• She applied concealer under her eyes to hide the dark circles.
• The makeup artist recommended a full-coverage concealer for the photoshoot.
• He dabbed concealer on the small blemish before the interview.
• The concealer matched her skin tone perfectly.
• She kept a small tube of concealer in her purse for touch-ups.
• The thick curtains acted as a concealer for the messy room behind them.