Ditty/ˈdɪti/ Definition 1 of 1Pro Tip 1/3Informal Use Often informal and used in casual settings, not typically found in formal writing. At the campfire, he played his guitar and sang a little ditty. Pro Tip 2/3Simple Melody 'Ditty' usually implies a simple and easy-to-remember melody which may be catchy. The children learnt the ditty in minutes. Pro Tip 3/3Humorous Tone Ditties can often have humorous or light-hearted content, rather than serious themes. The playful ditty made everyone laugh.