carol singing
US /ˈkær.əl ˌsɪŋ.ɪŋ/
UK /ˈkær.əl ˌsɪŋ.ɪŋ/
1.
the activity of singing Christmas carols, especially in a group and often in public places or from door to door
:
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We went carol singing around the neighborhood last night.
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The church group organizes carol singing every December.