1. adjective
a) On ones hands and knees.
He was on all fours, with three children on his back, riding him for a horse.
The new law was precisely on all-fours with the Homestead Act.
2. adverb
a) On ones hands and knees.
A bulky form was seen rising aft, and began marching on all fours with the movements of some big cautious beast.
The paternal longing ran on all fours with her own desire.
See Also: all fours
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