I . a.
Preceding, precedent, previous, prior, anterior, foregoing, precursory, forerunning, going before.
II . n.
1.
Precursor, forerunner.
2.
( Math. ) First term ( of a ratio ).
3.
( Gram. ) Preceding noun ( to which a pronoun refers ).
4.
( Logic .) First proposition ( in an enthymeme ).