To enlist oneself (in something) or become a member (of something)
To enter (a name, etc.) in a register, roll or list
To enlist (someone) or make (someone) a member of
To fail to do or carry out something due to oversight or carelessness.
To fail to care for or attend to something.
To omit to notice; to forbear to treat with attention or respect; to slight.
To ignore for the sake of simplifying calculations without significantly affecting accuracy.
Habitual lack of care.
The act of neglecting.
The state of being neglected.