interborough

[ in-ter-bur-oh, -buhr-oh ]

/ ˈɪn tərˌbɜr oʊ, -ˌbʌr oʊ /

between boroughs.

of, relating to, or located in two or more boroughs.

a transportation system operating between boroughs.

Origin of interborough

First recorded in 1900–05; inter- + borough

This platform used to be part of the Interborough Rapid Transit, or IRT.

Grand Central Terminal: 100 Years, 100 Facts |Sarah Begley |February 1, 2013 |DAILY BEAST
Those who go by the Interborough tube will probably find that changed conditions have rendered many of these rules obsolete.

Post-Impressions |Simeon Strunsky
An hour and a half every day for more than twenty years he had spent in the great underground system of the Interborough.

The Best Short Stories of 1921 and the Yearbook of the American Short Story |Various
Down he hurried into the subway station, and dropped his tithe of tribute into the multiple maw of the Interborough.

The Best Short Stories of 1921 and the Yearbook of the American Short Story |Various

But apparently, too, there must be life along the uptown route of the Interborough.

Post-Impressions |Simeon Strunsky