tenthly,adv.|ˈtɛnθlɪ| [f. tenth a. + -ly2.] In the tenth place. 1623in Fasti Aberd. (1854) 282 Tentlie, that [etc.]... Tuellftlie, that [etc.].1648D. Jenkins Wks. 38 Tenthly, wee maintaine that [etc.].1727Bailey vol. II, Tenthly, in the tenth Place or Order.