adjective

1. turning around a central point or axis, as a wheel; rotating
2. 1. having a rotating part or parts
   2. having blades that rotate on a hub rather than a reel a rotary lawn mower
3. occurring around an axis rotary motion

Etymology: ML rotarius < L rota, wheel: see roll

noun pl. rotaries -·ta·ries

1. a rotary machine or engine
2. Rotary Club
3. ☆ traffic circle