rotary

adj. moving or turning around a central point like a wheel.

adj. relating to or characterised by rotation; operating by means of a part that rotates around an axis.

“The old telephone had a rotary dial that you had to turn with your finger.”

“The engineer specified a rotary engine for the prototype, citing its superior power-to-weight ratio compared to traditional piston designs.”

Technical

n. a circular place where several roads meet and cars drive around a center island.

n. a circular road junction in which traffic moves in one direction around a central island.

“Take the second exit when you get to the rotary.”

“Navigating the multi-lane rotary during rush hour proved challenging for the tourists, who were more accustomed to standard four-way intersections.”

American English · Dialect

n. a member of an international group of people who meet to help their local community.

n. a local branch or a member of Rotary International, a global service organisation.

“My grandfather has been an active member of the local Rotary for forty years.”

“The Rotary hosted a charity gala last night to raise funds for the new children's wing at the municipal hospital.”

Formal