Melody: (pitch, theme, conjunct, disjunct)
Melody is the LINEAR/HORIZONTAL presentation of pitch (the word used to describe the highness or lowness of a musical sound). Many famous musical compositions have a memorable melody or theme.
THEME: a melody that is the basis for an extended musical work
Melodies can be derived from various scales (families of pitches) such as the traditional major and minor scales of tonal music, to more unusual ones such as the old church modes (of the Medieval and Renaissance periods: c. 500–1600), the chromatic scale and the whole tone scale (both used in popular and art-music styles of the late 19th and 20th-century periods), or unique scale systems devised in other cultures around the world.
Melodies can be described as:
• CONJUNCT (smooth; easy to sing or play)
• DISJUNCT (disjointedly ragged or jumpy; difficult to sing or play).