From Middle English interposicion, from Old French interposicion, from Latin interpositio.

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interposition (countable and uncountable, plural interpositions)

1. The act of interposing, or the state of being interposed; a being, placing, or coming between; mediation.
   • 1749, Henry Fielding, chapter 9, in The History of Tom Jones, a Foundling, volume I, London: A[ndrew] Millar,[…], →OCLC, book V, page 252:

     […] a Scuffle immediately ensued, which might have produced Mischief, had it not been prevented by the Interposition of Thwackum and the Physician […]

   • 1815 December (indicated as 1816), [Jane Austen], chapter 12, in Emma:[…], volume I, London: […] [Charles Roworth and James Moyes] for John Murray, →OCLC:

     “True, true,” cried Mr. Knightley, with most ready interposition—“very true […]”

   • 1842, [anonymous collaborator of Letitia Elizabeth Landon], chapter LV, in Lady Anne Granard; or, Keeping up Appearances.[…], volume III, London: Henry Colburn,[…], →OCLC, page 72:

     As he spoke, he tried to catch the remnant of the paper, but was too late—Lady Anne's eye had been more accurate than to admit such an interposition;...

2. The thing interposed.

• interpose
• interposal
• interposer
• interpositional