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box spring

noun

Definition of box spring

  1. :  a bedspring that consists of spiral springs attached to a foundation and enclosed in a cloth-covered frame

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First Known Use of box spring

1865

BOX SPRING Defined for English Language Learners

box spring

noun

Definition of box spring for English Language Learners

  • : a wide, flat box that is filled with metal springs and covered with cloth and that is put under a mattress for support

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