Home › Words › P › pansinusitispansinusitispansinusitis · noun — sinusitis that affects all of the paranasal sinuses.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom pan- + sinusitis.nounsinusitis that affects all of the paranasal sinusesDefinitions & examples from Wiktionary (CC BY-SA 3.0).