Definition of "interpose"

What watchful cares do interpose themselvesBetwixt your eyes and night?

1599 (first performance), William Shakespeare, “The Tragedie of Iulius Cæsar”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act II, scene i]

Lands intersected by a narrow frithAbhor each other. Mountains interposedMake enemies of nations who had elseLike kindred drops been mingled into one.

1785, William Cowper, “Book I. The Sofa.”, in The Task, a Poem, […], London: […] J[oseph] Johnson; […], page 30

As one who in his journey bates at Noone,Though bent on speed, so her the Archangel pausedBetwixt the world destroyed and world restored,If Adam aught perhaps might interpose;Then with transition sweet new Speech resumes.

1667, John Milton, “Book XII”, in Paradise Lost. […], London: […] [Samuel Simmons], […]; republished as Paradise Lost in Ten Books: […], London: Basil Montagu Pickering […], 1873, lines 1-5

“A beautiful country!”“I suppose it is. Everybody says so.”“Your cousin Feenix raves about it, Edith,” interposed her mother from her couch.

1846 October 1 – 1848 April 1, Charles Dickens, Dombey and Son, London: Bradbury and Evans, […], published 1848

Suppose, unlook’d for in a scene so rude,Long hid by interposing hill or wood,Some mansion neat and elegantly dress’d,By some kind hospitable heart possess’dOffer him warmth, security and rest;

1781 (date written), William Cowper, “Truth”, in Poems, London: […] J[oseph] Johnson, […]

The doctor now interposed, and prevented the effects of a wrath which was kindling between Jones and Thwackum […]

1749, Henry Fielding, chapter IX, in The History of Tom Jones, a Foundling, volumes (please specify |volume=I to VI), London: A[ndrew] Millar, […], book V

"My daughters," replied Sir Thomas, gravely interposing, "have their pleasures at Brighton, and I hope are very happy; […] "

1814 July, [Jane Austen], chapter VIII, in Mansfield Park: […], volume II, London: […] T[homas] Egerton, […], page 170