pillown.[OE. pilwe, AS. pyle, fr. L. pilvinus.]1. Anything used to support the head of a person when reposing; especially, a sack or case filled with feathers, down, hair, or other soft material.()[Resty sloth] finds the down pillow hard. (Shak.)2. (Mach.) A piece of metal or wood, forming a support to equalize pressure; a brass; a pillow block.()3. (Naut.) A block under the inner end of a bowsprit.()4. A kind of plain, coarse fustian.()Lace pillow, a cushion used in making hand-wrought lace. -- Pillow bier [OE. pilwebere; cf. LG. bre a pillowcase], a pillowcase; pillow slip. [Obs.] Chaucer. -- Pillow block (Mach.), a block, or standard, for supporting a journal, as of a shaft. It is usually bolted to the frame or foundation of a machine, and is often furnished with journal boxes, and a movable cover, or cap, for tightening the bearings by means of bolts; -- called also pillar block, or plumber block. -- Pillow lace, handmade lace wrought with bobbins upon a lace pillow. -- Pillow of a plow, a crosspiece of wood which serves to raise or lower the beam. -- Pillow sham, an ornamental covering laid over a pillow when not in use. -- Pillow slip, a pillowcase.()v. t. To rest or lay upon, or as upon, a pillow; to support; as, to pillow the head.()Pillows his chin upon an orient wave. (Milton.)