n. A washable, easily removable cloth cover for pillows.
the GNU version of the Collaborative International Dictionary of English
n. A removable case or covering for a pillow, usually of white linen or cotton cloth.
The Century Dictionary and Cyclopedia
n. A movable case or covering which is drawn over a pillow.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. bed linen consisting of a cover for a pillow
Word Usage
"But above all, there was the mystical process of hanging a pillowcase from the ceiling so that it hung over the stove, dangling above a pot as the thick, almost angrily-purple fluid dripped through the filter and into the pot."