I. ro ‧ ta ‧ ry 1 /ˈrəʊtəri $ ˈroʊ-/ BrE AmE adjective [only before noun]
[ Date: 1700-1800 ; Language: Medieval Latin ; Origin: rotarius , from Latin rota ; ⇨ ↑ rotate ]
1 . turning in a circle around a fixed point, like a wheel:
the rotary movement of the helicopter blades
2 . having a main part that turns like a wheel:
a rotary engine
II. rotary 2 BrE AmE noun ( plural rotaries ) [countable]
American English a ↑ roundabout