Definition of "colly" [col•ly]

• Black as coal (adjective)
• To make black, as with coal (verb)
• Soot. (noun)
• A blackbird (noun)
• Alternative spelling of collie. (noun)

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• ""colly" birds, colly referring to soot or coal black."
• "For the fourth day colly birds - or is it calling birds?'"
• "• Remember to give your true love four colly/calling birds on this fourth day of Christmas."