D defs.my
Entry 1 sense Webster, 1913

Inattention

/ĭnˌ-ət-ĕn'-chən/ · In·at·ten·tion · IPA /ˌɪnətˈɛntʃən/
01 n. Lack of attention, or failure to pay attention; disregard; heedlessness; neglect.
  1. 1.
    Lack of attention, or failure to pay attention; disregard; heedlessness; neglect.
    “Novel lays attract our ravished ears; But old, the mind inattention hears.” Pope.
Syn. Inadvertence; heedlessness; negligence; carelessness; disregard; remissness; thoughtlessness; neglect.
Inattention, Inadvertence. We miss seeing a thing through inadvertence when do not happen to look at it; through inattention when we give no heed to it, though directly before us. The latter is therefore the worse. Inadvertence may be an involuntary accident; inattention is culpable neglect. A versatile mind is often inadvertent; a careless or stupid one is inattentive.