"Show Me the Meaning of Being Lonely" is a song by American boy band Backstreet Boys, taken from their third studio album, Millennium (1999). It was written by Max Martin and Herbie Crichlow, with production by Martin and Kristian Lundin.
Jive Records selected the track to be released as the third single from the album, on December 14, 1999. It received generally favorable reviews from music critics, who commended the lush orchestration, its melody and the group's vocal performance. The song was one of 3 tracks to be previewed at the end of Britney Spears' debut album, ...Baby One More Time. It has also experienced success on the charts, reaching the top 10 in most countries it charted, also peaking at number three on the UK Singles Chart and number six on the US Billboard Hot 100 chart.
The music video for the track was released on New Year's Eve of 1999 and was directed by Stuart Gosling. It follows each of the band members in a separate dramatic history, with the band uniting for the video's end. The song also earned a Grammy award nomination during the 43rd Grammy Awards for Best Pop Performance by a Duo or Group with Vocals.