Definition of nonconference
: not of, relating to, or occurring within a conference; especially : of, relating to, or involving play between athletic teams that do not belong to the same conference (as in college football or basketball) nonconference games/opponents a nonconference victory … facing a brutal nonconference schedule that included away games against Texas, North Carolina, Kansas, Arizona and Kentucky … — Tim Crothers
First Known Use of nonconference
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