town watchmen were known as Waits and evolved into bands of carol singers .
.a. waits, (formerly) a band of musicians employed by a city or town to play music in parades, for official functions, etc.
b. a street musician, esp. a singer.
c. one of a band of carolers.
d. a piece sung by carolers, esp. a Christmas carol.
14. Obsolete. a watchman.