n.
Pronunciation: ˌ in- ə b- ' z ə r-v ə n(t)s
Function: noun
Etymology: French & Latin; French, from Latin inobservantia, from in- + observantia observance
Date: 1611
1 : lack of attention : HEEDLESSNESS
2 : failure to fulfill : NONOBSERVANCE
– in · ob · ser · vant \ -v ə nt \ adjective