an interposing or pleading on behalf of another person.
3.
a prayer to God on behalf of another.
4.
Roman History. the interposing of a veto, as by a tribune.
Origin: 1400–50; late ME < L intercessiōn- (s. of intercessiō), equiv. to intercess(us) ptp. of intercēdere to intercede(equiv. to interced- var. s. + -tus ptp. suffix, with -dt- > -ss-) + -iōn--ion
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.