south·er I. \ˈsau̇thə(r)\intransitive verb (-ed/-ing/-s) Etymology:south (I) + -er (as in batter) (I) : to turn, veer, or shift to the south — used chiefly of the wind II. noun (-s) Etymology:south (I) + -er, n. suffix : a southerly wind < the anchorage offers pretty fair protection from anything except a souther >