† tranˈquilleObs.rare. [n. use of F. tranquille: see prec.Cf. L. tranquillum peace, quietness.] = tranquillity. 1412–20Lydg.Chron. Troy ii. 1084 Þis addre..awakyd Priamus, And..Made him wery to lyuen in tranquille.Ibid. 1882 To trouble, allas, þe calm of his tranquille.