How do you spell Melody

Available Definitions:
1)  n. - A sweet or agreeable succession of sounds.
2)  n. - 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)  n. - The air or tune of a musical piece.