1. the quality of being catchy; the ability to be easily remembered or to stick in one's mind
Usage: often used to describe music, melodies, slogans, or phrases

Examples

• The catchiness of the song's chorus made it an instant hit on the radio.
• Advertisers rely on the catchiness of jingles to make their brands memorable.
• The catchiness of the slogan helped the campaign go viral on social media.
• Despite the catchiness of the melody, the lyrics were quite complex.
• The band's new album lacks the catchiness of their earlier work.
• The catchiness of the tune made it impossible to get out of my head.