ontological argument
noun
: an argument for the existence of God based upon the meaning of the term God
Example Sentences
Recent Examples on the Web That kind of ontological argument might be a hard sell for some Americans. 
David Marchesephotograph By Christopher Anderson/magnum, For The New York Times, New York Times, 1 Apr. 2022 April 27, 2020 There will surely be many disagreements about which titles are and are not included, some of which may lead us into tortured ontological arguments about what constitutes a summer movie in the first place. Los Angeles Times, 28 Apr. 2020
David Marchesephotograph By Christopher Anderson/magnum, For The New York Times, New York Times, 1 Apr. 2022 April 27, 2020 There will surely be many disagreements about which titles are and are not included, some of which may lead us into tortured ontological arguments about what constitutes a summer movie in the first place. Los Angeles Times, 28 Apr. 2020 Word History
First Known Use
1877, in the meaning defined above