a modular system of shelves, some of which may be enclosed by doors, either mounted on a wall or arranged in freestanding units, for holding books, bric-a-brac, etc., and sometimes including such features as a drop-leaf desk or specially designed storage space, as to accommodate records or electronic equipment.
Origin of wall system
First recorded in 1965–70
Also called wall unit.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019