usuaryRoman Law.|ˈjuːzjuːərɪ| [ad. late L. ūsuāri-usn., f.ūsuārius a., f. L. ūsus use n.] One who has the use but not the ownership of a thing. 1871Poste Gaius iv. 507 As the usufrutuary has no possession, it follows a fortiori that the usuary has no possession.