Mickle definitions

mĭk'əl
Great.
adjective
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Greatly.
adverb
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Much.
adjective
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(now chiefly Scotland and Northumbrian) Large, great.
adjective
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(now chiefly Scotland and Northumbrian) Much; a great quantity or amount of.
adjective
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(chiefly Scotland) A great amount.

Many a little makes a mickle.

noun
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(Scotland) A small amount.
noun
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Origin of mickle

From Middle English mikel, muchel, mochel, mukel, from Old English miċel, myċel or Old Norse mikill, both from Proto-Germanic *mikilaz.