Definition of "backless" [back•less]

• Having no back, said of things that typically have backs, such as chairs or dresses (adjective)
• Having an uncovered back, having a back that shows skin (adjective)

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• "It's hideously severe from the front and it's backless, which is fine on a dress for a party, but for the red carpet a backless dress is a disaster."
• "( "It is the ultimate 'backless' dress," Mr. Gaultier wrote in the museum notes.)"
• "While at it, looks like they're in the mood for some 'backless' fun too!"