swimmy /ˈswɪ.mi/adjective 1noun 1forms 5 adjective1 •Dizzy; swirling or moving as if seen in a daze.I hadn't noticed at Peter Anderson's—my head was too swimmy to notice anything. — 1901 noun1 •An inflatable armband to help children swim. formsswimmies · more swimmy · swimmier · most swimmy · swimmiest