meaning of infection
1.  The act or process of infecting. 
2.  That which infects, or causes the communicated disease; any effluvium, miasm, or pestilential matter by which an infectious disease is caused. 
3.  The state of being infected; contamination by morbific particles; the result of infecting influence; a prevailing disease; epidemic. 
4.  That which taints or corrupts morally; as, the infection of vicious principles. 
5.  Contamination by illegality, as in cases of contraband goods; implication. 
6.  Sympathetic communication of like qualities or emotions; influence. 
7.  international law illegality that taints or contaminates a ship or cargo rendering it liable to seizure
						 
