01 a. Indifferent to obligation or duty.
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1.
Indifferent to obligation or duty.[Obs.]“Thou drown'st thyself in inofficious sleep.” — B. Jonson.
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2.
Not officious; not civil or attentive.[Obs.]
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3.
Regardless of natural obligation; contrary to natural duty; unkind; -- commonly said of a testament made without regard to natural obligation, or by which a child is unjustly deprived of inheritance.(Law)