COLONNADE, noun 1. In architecture, a peristyle of a circular figure, or a series of columns, disposed in a circle, and insulated within side. 2. Any series of range of columns. A polystyle colonnade is a range of columns too great to be taken in by the eye at a single view; as that of the palace of St. Peter at Rome, consisting of 284 columns of the Doric order.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI