1. a person who congratulates or expresses praise and good wishes to someone
Usage: formal or literary; relatively rare in modern usage

Examples

• The congratulator approached the winner with a warm smile and hearty handshake.
• Many congratulators lined up to offer their best wishes to the newly promoted executive.
• As a gracious congratulator, she always took time to acknowledge others' achievements.
• The team's congratulators filled the locker room with cheers and praise.
• He served as the main congratulator at the graduation ceremony, honoring each student's accomplishment.