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The Collaborative International Dictionary of English v.0.48:

round robin \round" rob"in\, round-robin \round"-rob"in\(round" r[o^]b"[i^]n), n. 1. Any series or sequence of actions. [PJC] 2. A document circulated from one person to another in a group, often with comments added by each recipient. [PJC] 3. A petition or similar document, in which the signatures are arranged in circular form in order to conceal the order of signing. [PJC] 4. (Sports) A tournament in which each contestant plays against every other contestant at least once; a failure to win any contest does not result in elimination from the tournament. Contrasted with elimination tournament [PJC]
The Free On-line Dictionary of Computing (18 March 2015):

round-robin A scheduling algorithm in which processes are activated in a fixed cyclic order. Those which cannot proceed because they are waiting for some event (e.g. termination of a child process or an input/output operation) simply return control to the scheduler. The virtue of round-robin scheduling is its simplicity - only the processes themselves need to know what they are waiting for or how to tell if it has happened. However, if a process goes back to sleep just before the event for which it is waiting occurs then the event will not get handled until all the other processes have been activated. Compare priority scheduling. (1996-02-10)