on all fours


On one's hands and knees, as in Seven of us were on all fours, looking for the lost earring in the sand. In this idiom fours refers to the four limbs. [1300s]

Words Nearby on all fours

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.