Entreaty in favor of another, especially a prayer or petition to God in behalf of another.
Mediation in a dispute.
[Middle English, from Old French, from Latin intercessiō, intercessiōn-, intervention, from intercessus, past participle of intercēdere, to intervene; see intercede.] in'ter·ces'sion·al adj., in'ter·ces'sor (-sěs'ər) n., in'ter·ces'so·ry adj.