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a. A series of arches supported by columns, piers, or pillars, either freestanding or attached to a wall to form a gallery.
b. A series of arches employed for decorative purposes.
2. A roofed passageway or lane, especially one with shops on one or both sides.
a. A commercial establishment featuring an array of large mechanical or electronic games, such as pinball machines or video games, that charge players money before each game.
b. A section within another establishment, as at a bowling alley or movie theater, that features such games.
tr.v. ar·cad·ed, ar·cad·ing, ar·cades
To provide with or form into an arcade: closed off and arcaded the narrow street.

[French, from Italian arcata, from arco, arch, from Latin arcus.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.