RhymeZone: inofficious definitions

Definitions of inofficious:

adjective: (obsolete) Indifferent to obligation or duty.
adjective: (obsolete) Not officious; not civil or attentive.
adjective: (obsolete, law) Contrary to one's natural obligation or duty, as of a testament by which a child is unjustly deprived of inheritance.

(Definitions from Wiktionary)