Home › Words › S › subinfectionsubinfectionsubinfection means A secondary infection (in a patient recovering from a primary infection).Among words judged in Lexicurio's Arena, subinfection ranks #25,601 of 42,747 for Qualifying.EtymologyFrom sub- + infection.nounA secondary infection (in a patient recovering from a primary infection)Definitions & examples from Wiktionary (CC BY-SA 3.0).