Definition of "tuneless" [tune•less]

• Deficient in melody; not tuneful. (adjective)
• Producing no music; silent. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "But then "Spin" had to be sung by bassist Tracy Wormworth when Patty went M.I.A., during exhaustive recording sessions in England (Tracey had also recorded the title track, which some people actually prefer, but then Patty did her own take and that was used.) "Pleasure" is an unnecessary instrumental (were vocals dropped when Patty vanished?) and "They're All Out of Liquor, Let's Find Another Party" is a great title, but the song is as humorless as it is tuneless, which is everything the Waitresses were not."
• "Once the show actually begins, it's obvious that writers Craig Christie and Andrew Patterson have done their homework - with the likes of Sweden represented by a perky Abba-style quartet, the UK by a couple of chavvy singers with a pointless ballad, Iceland by a Bjork-alike singing a tuneless, meaningless song."
• "The first bossa nova vocalist that most of us heard was Astrud Gilberto , who gave the world the false impression that Brazilians sang in a mono-dynamic, largely tuneless voice, free from inflection or tonal color."