Melody

Part of speech: noun (n.)

1. A sweet or agreeable succession of sounds. Lulled with sound of sweetest melody. Shak.

2. A rhythmical succession of single tones, ranging for the most part within a given key, and so related together as to form a musical whole, having the unity of what is technically called a musical thought, at once pleasing to the ear and characteristic in expression.

3. The air or tune of a musical piece.

Synonyms: See Harmony.