“If you wish to converse with me,” said the philosopher Voltaire, “define your terms.” Tom Moran of the Star-Ledger editorial board (“This Biden gaffe was a killer”) would do well to consider this advice before criticizing President Joe Biden’s use of the term “pandemic.” In an answer to a question in a recent “60 Minutes” interview, Biden said, “The pandemic is over.” “Pandemic,” along with “epidemic” and “endemic,” refer in decreasing order to the geographic extent and severity of a disease. COVID-19 has been considered a pandemic because its outbreak has been worldwide. An epidemic refers t…