from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An ancient Greek covered walk or colonnade, usually having columns on one side and a wall on the other.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. In Ancient Greece, a walkway with a roof supported by colonnades, often with a wall on one side; a portico.
from The Century Dictionary and Cyclopedia
- n. In Greek architecture, a portico, usually a detached portico, often of considerable extent, generally near a public place to afford opportunity for walking or conversation under shelter. The Greek stoa was often richly adorned with sculpture and painting. Many examples had two stories.
Greek, porch; see stā- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek στοά (Wiktionary)