infection -- (the pathological state resulting from the invasion of the body by pathogenic microorganisms)
infection -- ((phonetics) the alteration of a speech sound under the influence of a neighboring sound)
infection -- ((medicine) the invasion of the body by pathogenic microorganisms and their multiplication which can lead to tissue damage and disease)
infection, contagion, transmission -- (an incident in which an infectious disease is transmitted)
contagion, infection -- (the communication of an attitude or emotional state among a number of people; "a contagion of mirth"; "the infection of his enthusiasm for poetry")
infection -- (moral corruption or contamination; "ambitious men are led astray by an infection that is almost unavoidable")
infection -- ((international law) illegality that taints or contaminates a ship or cargo rendering it liable to seizure)