What does "antecedent" mean?

Additional senses

1. 2.That which goes before in time; that which precedes. South. The Homeric mythology, as well as the Homeric language, has surely its antecedents. Max Miller.
2. 3.One who precedes or goes in front. [Obs.] My antecedent, or my gentleman usher. Massinger.
3. 4.pl. The earlier events of one's life; previous principles, conduct, course, history. J. H. Newman. If the troops . . . prove worthy of their antecedents, the victory is surely ours. Gen. G. McClellan.
4. 5.(Gram.) The noun to which a relative refers; as, in the sentence "Solomon was the prince who built the temple," prince is the antecedent of who.
5. 6.(Logic) (a) The first or conditional part of a hypothetical proposition; as, If the earth is fixed, the sun must move. (b) The first of the two propositions which constitute an enthymeme or contracted syllogism; as, Every man is mortal; therefore the king must die.
6. 7.(Math.) The first of the two terms of a ratio; the first or third of the four terms of a proportion. In the ratio a:b, a is the antecedent, and b the consequent.