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1. an arm and a leg, a great deal of money: to cost an arm and a leg. 2. arm in arm, with arms linked together or intertwined: They walked along arm in arm. 3. at arm's length, on terms lacking in intimacy; at a distance: to keep business associates at arm's length. 4. in the arms of Morpheus, asleep.5. put the arm on, Slang. a. to solicit or borrow money from.. arm in arm, with arms linked together or intertwined: They walked along arm in arm. 3. at arm's length, on terms lacking in intimacy; at a distance: to keep business associates at arm's length. 4. in the arms of Morpheus, asleep. 5. put the arm on, Slang.
The arm's length standard is instrumental to determine how much of the profits should be attributed to one entity and, consequently, the extent of a country's tax claim on such entity. The OECD has developed thorough guidelines on how the arm's length principle should be applied in this context. Under this approach, a price is considered appropriate if it is within a range of prices that would be charged by independent parties dealing at arm's length.