Entry 1 sense Webster, 1913 Pecuniary /(pē̇*kūn"yā̇*rĭ*ly̆)/ · Pe·cun·ia·ry · IPA /pəˈkjuniˌɛɹi/ 01 a. Relating to money; monetary; as, a pecuniary penalty; a pecuniary reward. 1. Relating to money; monetary; as, a pecuniary penalty; a pecuniary reward.