Definition of arm's length
1 : a distance discouraging personal contact or familiarity <kept former friends at arm's length now>
2 : the condition or fact that the parties to a transaction are independent and on an equal footing
First Known Use of arm's length
Legal Definition of arm's length
: the condition of the parties to a business deal in which each has independent interests and one does not dominate the other —often used in the phrase at arm's length <a contract made at arm's length>
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