Definition of song-poem in US English:

song-poem

noun

  • 1A poem set to music; a song whose lyrics are considered to have a particularly poetical character.

  • 2A composition by an amateur lyricist which is sent, typically in response to a classified advertisement, to an individual or company who arrange to have it set to music, performed, and recorded at the lyricist's expense.

Origin

Late 19th century; earliest use found in Isle of Man Times.