sonsy /ˈsɒnsi/ adjective1 •(Scotland, no longer used) lucky; fortunate; thriving; plump[…]as black a Jacobite as the auld leaven can make him; but a sonsy, merry companion, that none of us think it worth while to break wi' for all his brags and his clavers. — 1824 formsmore sonsy · sonsier · most sonsy