1. a person who admits or acknowledges something
2. a person who allows entry or grants admission

Examples

• The admitter at the concert checked everyone’s tickets carefully.
• He was an admitter of his own mistakes and always apologized.
• The hospital admitter processed new patients throughout the night.
• She became known as an admitter of uncomfortable truths.
• The club’s admitter decided who could enter the exclusive event.
• As an admitter of guilt, he faced the consequences honestly.