mid-15c., "act of granting or yielding" (especially in argumentation), from Old French concession (14c.) or directly from Latin concessionem (nominative concessio) "an allowing, conceding," noun of action from past-participle stem of concedere "to give way, yield," figuratively "agree, consent, give precedence," from con-, here perhaps an intensive prefix (see con-), + cedere "to go, grant, give way" (from PIE root *ked- "to...