Melody
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A melody (from Greek μελῳδία - melōidía, "singing, chanting"[1]), also tune, voice, or line, is a linear succession of musical tones which is perceived as a single entity. In its most literal sense a melody is a sequence of pitches and durations, while more figuratively the term has occasionally been extended to include successions of other musical elements such as tone color.
Melodies often consist of one or more musical phrases or motifs, and are usually repeated throughout a song or piece in various forms. Melodies may also be described by their melodic motion or the pitches or the intervals between pitches (predominantly conjuct or disjunct or with further restrictions), pitch range, tension and release, continuity and coherence, cadence, and shape. "Many extant explanations [of melody] confine us to specific stylistic models, and they are too exclusive."[2]