A soft cushion used to support the head in bed.

(geology) A pillow lava.

(engineering) A piece of metal or wood, forming a support to equalize pressure; a brass; a pillow block.

(nautical) A block under the inner end of a bowsprit.

The socket of a pivot.

(uncountable) A kind of plain, coarse fustian.

(transitive) To rest as on a pillow.