on all fours

adjective

Legal Definition of on all fours

: relevant and very similar in facts and issues of law the parties' dispute about the CBA's ratification date presents a formation question in the sense above, and is therefore not on all fours with, for example, the formation disputes we referenced in Buckeye Check Cashing, Inc. v. CardegnaGranite Rock Co. v. International Brotherhood of Teamsters, 130 S. Ct. 2847 (2010)

History and Etymology for on all fours

from the Latin maxim Nullum simile quattuor pedibus currit, “No comparison runs on all fours,” i.e., comparisons are generally lame in some respect

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a usually brief trip or an expedition

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