(~s)
1.
A ~ is a curved shape that is wider in the middle than at its ends, like the shape of the moon during its first and last quarters. It is the most important symbol of the Islamic faith.
A glittering Islamic ~ tops the mosque.
...a narrow ~ of sand dunes.
...a ~ moon.
N-COUNT
2.
Crescent is sometimes used as part of the name of a street or row of houses that is usually built in a curve. (mainly BRIT)
...44 Colville Crescent.
N-IN-NAMES