Definition of "pillow"

The appearance of the entire tomb is as if the warrior had seen the vision of Christ in his dying moments, and had fallen back peacefully upon his pillow, with his eyes still turned to it, and his hands clasped in prayer.

1853, John Ruskin, “Roman Renaissance”, in The Stones of Venice, volume III (The Fall), London: Smith, Elder, and Co., […], § LVII, page 74

...but Lucy was too thoroughly exhausted to awaken. There she lay, her head pillowed upon her arm, like a child that had cried itself to rest; while Francesca bent over her,...

1834, L[etitia] E[lizabeth] L[andon], chapter X, in Francesca Carrara. […], volume III, London: Richard Bentley, […], (successor to Henry Colburn), page 73

As we stop in front of a tenement to watch one of these groups, a dirty baby in a single brief garment—yet a sweet, human little baby despite its dirt and tatters—tumbles off the lowest step, rolls over once, clutches my leg with unconscious grip, and goes to sleep on the flagstones, its curly head pillowed on my boot.

1890, Jacob A[ugust] Riis, “The Sweaters of Jewtown”, in How the Other Half Lives: Studies among the Tenements of New York, New York, N.Y.: Charles Scribner’s Sons, page 135

She had pillowed her head on her arm.

1942, Rebecca West, Black Lamb and Grey Falcon, Canongate, published 2006, pages 815–6