"rotary" in the noun sense
1. traffic circle, circle, rotary, roundabout
a road junction at which traffic streams circularly around a central island
"the accident blocked all traffic at the rotary"
2. synchronous converter, rotary, rotary converter
electrical converter consisting of a synchronous machine that converts alternating to direct current or vice versa
"rotary" in the adjective sense
1. rotary
relating to or characterized by rotation
"rotary dial"
2. circular, rotary, orbitual
describing a circle moving in a circle
"the circular motion of the wheel"
Source: WordNet® (An amazing lexical database of English)
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