tie-line

noun
\ˈtī-ˌlīn \

Definition of tie-line 

: a telephone line that directly connects two or more private branch exchanges

First Known Use of tie-line

1923, in the meaning defined above

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Dictionary Entries near tie-line

tie hack

tie in

tie-in

tie-line

tiemannite

tie mill

tiend

Statistics for tie-line

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Time Traveler for tie-line

The first known use of tie-line was in 1923

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