01 a. Proceeding step by step, or by gradations; gradual.
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1.
Proceeding step by step, or by gradations; gradual.“Could we have seen [Macbeth's] crimes darkening on their progress . . . could this gradatory apostasy have been shown us.” — A. Seward.
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2.
Suitable for walking; -- said of the limbs of an animal when adapted for walking on land.(Zool.)