from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Masonry made with rubble.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A form of masonry made of large stones loosely thrown together and then optionally grouted.
from the GNU version of the Collaborative International Dictionary of English
- n. Masonry constructed of unsquared stones that are irregular in size and shape.
from The Century Dictionary and Cyclopedia
- n. Masonwork built of rubble-stone.
rubble + work (Wiktionary)