The enumeration date is as you surmised the actual date the info was recorded. The official enumeration date was 1 June 1850, all questions were to refer to that date. So she probably died sometime between 1 June and Sept 11. Don.
Definition of plague. 1  an annoyance; those children are a damn plague. 2  any large scale calamity (especially when thought to be sent by God) 3  a swarm of insects that attack plants; a plague of grasshoppers. 4  any epidemic disease with a high death rate.
plague. 1. an epidemic disease that causes high mortality; pestilence. 2. an infectious, epidemic disease caused by a bacterium, Yersinia pestis, characterized by fever, chills, and prostration, transmitted to humans from rats by means of the bites of fleas.Compare bubonic plague. 3. any widespread affliction, calamity, or evil. 4. any cause of trouble, annoyance, or vexation.lague. 1. an epidemic disease that causes high mortality; pestilence. 2. an infectious, epidemic disease caused by a bacterium, Yersinia pestis, characterized by fever, chills, and prostration, transmitted to humans from rats by means of the bites of fleas. Compare bubonic plague.