Any thing that precedes another thing, especially the cause of the second thing.

An ancestor.

(grammar) A word, phrase or clause referred to by a pronoun.

(logic) The conditional part of a hypothetical proposition, i.e. p → q {\displaystyle p\rightarrow q} , where p {\displaystyle p} is the antecedent, and q {\displaystyle q} is the consequent.

(logic) The first of two subsets of a sequent, consisting of all the sequent's formulae which are valuated as true.

(mathematics) The first term of a ratio, i.e. the term a in the ratio a:b, the other being the consequent.

(chiefly in the plural) Previous principles, conduct, history, etc.

Earlier, either in time or in order.

Presumptive.