hoarding

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A temporary wooden fence around a building or structure under construction or repair.
2. n. Chiefly British A billboard.

Century Dictionary and Cyclopedia

1. n. The act of amassing or making a hoard.
2. n. In medieval fortification, a covered structure of timber, either temporary or permanent, placed on top of the walls and towers of a fortress to afford increased facilities for defense. The hoarding projected beyond the face of the wall, in order that missiles might be dropped through machicolations or holes in its floor upon an enemy below; and it was provided with numerous loopholes for the convenience of the defending marksmen.
3. n. A fence for inclosing a house and materials while builders are at work; any similar inclosure of boards.
4. n. Hence A bill-board; any boarding on which bills are posted.
5. n. Also hoard.

Wiktionary

1. n. UK A temporary fence-like structure built around building work to add security and prevent accidents to the public.
2. n. A roofed wooden shield placed over the battlements of a castle and projecting from them.
3. n. chiefly UK A billboard.
4. v. present participle of hoard.

GNU Webster's 1913

1. n. (Arch.), engraving A screen of boards inclosing a house and materials while builders are at work.
2. n. A fence, barrier, or cover, inclosing, surrounding, or concealing something.

WordNet 3.0

1. n. large outdoor signboard