non-observanceBrE /ˌnɒn əbˈzɜːvəns/ 🔊NAmE /ˌnɑːn əbˈzɜːrvəns/ 🔊 noun [uncountable] (formal) the failure to keep or to obey a rule, custom, etc. 违反，不遵从（规章、习俗等） OPP observance See non- for more