Antecedent means earlier, pre-existing or previous. Any preceding thing or the quality or fact of being before.
Example of some statutes in Florida using the term Antecedent.
Fla. Stat. § 672.720 (Uniform Commercial Code, Sales)
Effect of "cancellation" or "rescission" on claims for antecedent breach
Unless the contrary intention clearly appears, expressions of "cancellation" or "rescission" of the contract or the like shall not be construed as a renunciation or discharge of any claim in damages for an antecedent breach.
Fla. Stat. § 673.3031 (Uniform Commercial Code, Negotiable instruments)
Value and consideration
(1) An instrument is issued or transferred for value if:
(a) The instrument is issued or transferred for a promise of performance, to the extent the promise has been performed;
(b) The transferee acquires a security interest or other lien in the instrument other than a lien obtained by judicial proceeding;
(c) The instrument is issued or transferred as payment of, or as security for, an antecedent claim against any person, whether or not the claim is due;
(d) The instrument is issued or transferred in exchange for a negotiable instrument; or
(e) The instrument is issued or transferred in exchange for the incurring of an irrevocable obligation to a third party by the person taking the instrument.