From Longman Dictionary of Contemporary Englishinvalidityin‧va‧lid‧it‧y /ˌɪnvəˈlɪdəti/ AWL noun [uncountable] formal  1 MIthe state of being too ill, old, or injured to work invalidity benefit2 ILLEGALthe state of being not legally or officially acceptable 
                                                    
                                                
