Definition of round-robin
1a
: a written petition, memorial, or protest to which the signatures are affixed in a circle so as not to indicate who signed first
b
: a statement signed by several persons
c
: something (such as a letter) sent in turn to the members of a group each of whom signs and forwards it sometimes after adding comment
3
: a tournament in which every contestant meets every other contestant in turn
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Merriam-Webster unabridged
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Time Traveler for round-robin
The first known use of round-robin was in 1698
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