Noah Webster's New International Dictionary of the English Language

1. (adv.) Not to attend to with due care or attention; to forbear one's duty in regard to; to suffer to pass unimproved, unheeded, undone, etc.; to omit; to disregard; to slight; as, to neglect duty or business; to neglect to pay debts.

2. (adv.) To omit to notice; to forbear to treat with attention or respect; to slight; as, to neglect strangers.

3. (v.) Omission of proper attention; avoidance or disregard of duty, from heedlessness, indifference, or willfulness; failure to do, use, or heed anything; culpable disregard; as, neglect of business, of health, of economy.

4. (v.) Omission if attention or civilities; slight; as, neglect of strangers.

5. (v.) Habitual carelessness; negligence.

6. (n.) The state of being disregarded, slighted, or neglected.