Definify.com
Webster 1913 Edition
Negligence
Neg′li-gence
,Noun.
 [F. 
négligence
, L. negligentia
.] The quality or state of being negligent; lack of due diligence or care; omission of duty; habitual neglect; heedlessness. 
2. 
An act or instance of negligence or carelessness. 
remarking his beauties, . . . I must also point out his 
negligences 
and defects. Blair.
3. 
(Law) 
The omission of the care usual under the circumstances, being convertible with the Roman 
culpa
. A specialist is bound to higher skill and diligence in his specialty than one who is not a specialist, and liability for negligence varies acordingly. Contributory negligence
. See under 
 Contributory
.
Syn. – Neglect; inattention; heedlessness; disregard; slight. 
 – 
Negligence
, Neglect
. These two words are freely interchanged in our older writers; but a distinction has gradually sprung up between them. As now generally used, negligence is the habit, and neglect the act, of leaving things undone or unattended to. We are negligent as a general trait of character; we are guilty of neglect in particular cases, or in reference to individuals who had a right to our attentions. Webster 1828 Edition
Negligence
NEGLIGENCE
,Noun.
 1.
 Neglect; omission to do; more generally, 2.
 Habitual omission of that which ought to be done, or a habit of omitting to do things, either from carelessness or design.  Negligence is usually the child of sloth or laziness, and the parent of disorders in business, often of poverty.