Carollers

a song, especially of joy.
a Christmas song or hymn.
a seat in a bay window or oriel.
a compartment in a cloister, similar to a carrel.
a kind of circular dance.
to sing Christmas songs or hymns, especially in a group performing in a public place or going from house to house.
to sing, especially in a lively, joyous manner; warble.
to sing joyously.
to praise or celebrate in song.
Historical Examples

Against the deferential gentleman he ranges all saints and poets, “His carollers and gay minstrels—His merry men.”
The Life of Francis Thompson Everard Meynell

noun
a joyful hymn or religious song, esp one (a Christmas carol) celebrating the birth of Christ
(archaic) an old English circular dance
verb -ols, -olling, -olled (US) -ols, -oling, -oled
(intransitive) to sing carols at Christmas
to sing (something) in a joyful manner

masc. proper name, from Medieval Latin Carolus (see Charles). As a fem. proper name, an abbreviation of Caroline. The masc. name never has been popular in U.S.; the fem. form was common after c.1900 and was a top-10 name for U.S. girls born 1936-1950.
n.

c.1300, “joyful song,” also “dance in a ring,” from Old French carole “kind of dance in a ring, round dance accompanied by singers,” perhaps from Medieval Latin choraula “a dance to the flute,” from Latin choraules “flute-player,” from Greek khoraules “flute player who accompanies the choral dance,” from khoros “chorus” (see chorus) + aulein “to play the flute,” from aulos “reed instrument” (see alveolus). The meaning “Christmas hymn of joy” is attested from c.1500.
v.

c.1300, “to dance in a ring,” from Old French caroler, from carole (see carol (n.)). As “to sing” from late 14c. Related: Caroled; caroling.