Definition of back-and-forth
(Entry 1 of 2)
: discussion sense 1, give-and-take
also
: exchange sense 1
back and forth
adverbDefinition of back and forth (Entry 2 of 2)
: backward and forward
also
: between two places or persons
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Merriam-Webster unabridged
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The first known use of back-and-forth was in 1613
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