ORDER, in architecture, is a system of the several members, ornaments, and proportions of columns and pilasters; or a regular arrangement of the projecting parts of a building, especially the column, so as to form one beautiful whole. See ARCHITECTURE, Chap. 1. Part 1. page 234, &c.
ORDER is also used for a division or class of any thing: thus the tribe of animals called birds, is subdivided into six orders. See ORNITHOLOGY, ZOOLOGY, &c.