The definition of a crescent is a half-moon or arc shape.(noun)
Crescent is defined as something with a half-moon or arc shape.(adjective)
The waning moon is an example of something that would be described as a crescent moon.
See crescent in Webster's New World College Dictionary
Origin: < the Turk crescent emblemTurkish or Muslim power
Origin: altered (infl. by L) < ME cressaunt < OFr creissant, prp. of creistre, to increase < L crescere, to come forth, grow, inchoative of creare: see create
See crescent in American Heritage Dictionary 4
Origin: Middle English cressaunt
Origin: , from Anglo-Norman
Origin: , variant of Old French creissant
Origin: , from
Origin: present participle of creistre, to grow
Origin: , from Latin crēscere; see ker-2 in Indo-European roots.
Learn more about crescent