Webster's 1828 Dictionary
CONCURRING
ppr. Meeting in the same joint; agreeing; running or acting together; uniting in action; contributing to the same event or effect; consenting. A concurring figure, in geometry, is one which, being laid on another, exactly meets every part of it, or one which corresponds with it in all its parts.
Webster's 1913 Dictionary
CONCURRING
CONCURRING Con *cur "ring, a.
Defn: Agreeing. Concurring figure (Geom.), one which, being laid on another, exactly meets every part of it, or one which correspondends with another in all its parts.
The Wordsmith Dictionary