wing
n. countablen. one of the parts of a bird, insect, or airplane that allows it to fly. It can also mean a part of a building that sticks out from the main middle section.
n. a lateral appendage or structure used for flight in animals or aircraft. It also designates a subordinate section of a larger building or an organizational faction.
The bird spread its wings and flew away.
The hospital recently opened a new wing dedicated entirely to children's health and emergency care.
While the aircraft's fuselage remained intact after the landing, the left wing sustained significant structural damage that required specialized repairs before it could be cleared for flight.
Commonly used metaphorically in the phrase 'under one's wing' to describe a protective or mentoring relationship.