01 a. Moving with a quick, lively pace, or capable of so doing; dashing.
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1.
Moving with a quick, lively pace, or capable of so doing; dashing.“Four spanking grays ready harnessed.” — G. Colman, the Younger.
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2.
Large; considerable.[Colloq.]
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3.
Very; extremely; -- used especially in the phrase spanking new or brand spanking new, meaning completely new and unused.[informal]