In grammar, an antecedent is one or more words that establish the meaning of a pronoun or other pro-form.[1] For example, in the sentence "John arrived late because traffic held him up," the word "John" is the antecedent of the pronoun "him." Pro-forms usually follow their antecedents, but sometimes precede them. In the latter case, the more accurate term would technically be postcedent, although this term is not commonly distinguished from antecedent because the definition of antecedent usually encompasses it. The linguistic term that is closely related to antecedent and pro-form is anaphora. Theories of syntax explore the distinction between antecedents and postcedents in terms of binding.