act between parties with a view to reconciling differences
The summons announced that the civil and military leader of the province would arrive on the following Friday ready to intercede in the conflict.
One Hundred Years of Solitude
the time between one event, process, or period and another
G.M. said that its vice president for United States sales and service, Alan Batey, will take over Mr. Ewanick’s global marketing duties in the interim.
New York Times
(Jul 29, 2012)
lying between two extremes in time, space, or state
McCoy said Manning is working on all of his throws - short, intermediate and deep - in offseason workouts as the Broncos ramp up toward training camp.
Seattle Times
(May 31, 2012)
During the three years' interregnum between Yau and Shun there was more of it than in the interval before this present dynasty appeared.
Wilson, Epiphanius