Origin: 1375–1425; late ME antecessour (< MF) < L antecessor he who goes before, a predecessor, equiv. to anteced-, var. s. of antecēdere (see antecede) + -tor-tor; cf. ancestor
an·te·ces·sor (ān'tĭ-sěs'ər) n. One who precedes; a predecessor.
[Middle English antecessour, forebear, from Latin antecessor, forerunner, predecessor in office, from antecessus, past participle of antecēdere, to go before; see antecede.]