all-fours

All` fours" Etym: [formerly, All` four".] Defn: All four legs of a quadruped; or the two legs and two arms of a person. To be, go, or run, on all fours (Fig.), to be on the same footing; to correspond (with) exactly; to be alike in all the circumstances to be considered. "This example is on all fours with the other." "No simile can go on all fours." Macaulay.

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