non-occurring adjective 1noun 1 adjective1 •That does not occur.The account, which that very ancient Father really gives of the matter, differs toto coelo from that, which, through the medium of a non-occurring citation, is gravely ascribed to him by Dr. Wiseman. — 1840 noun1 •The instance of something not occurring.The non-occurring of cholera in New York in the autumn of 1892 was not due in any important degree to the quarantine; but infinitely more to the fact that the other conditions did not prevail. — 1900