Entry 1 sense Webster, 1913 Lacedæmonian · Lac·e·dæ·mo·ni·an · IPA 01 a. Of or pertaining to Lacedæmon or Sparta, the chief city of Laconia in the Peloponnesus. 1. Of or pertaining to Lacedæmon or Sparta, the chief city of Laconia in the Peloponnesus.