Emily Dickinson Lexicon

PA-VIL'ION, n. [pavil'yun; Fr. pavillon; Sp. pabellon; Port. pavilham; Arm. pavilhon; W. pabell; It. paviglione and padiglione; L. papilio, a butterfly, and a pavilion. According to Owen, the Welsh pabell signifies a moving habitation.]

1. A tent; a temporary movable habitation.
2. In architecture, a kind of turret or building, usually insulated and contained under a single roof; sometimes square and sometimes in the form of a dome. Sometimes a pavilion is a projecting part in the front of a building; sometimes it flanks a corner. – Encyc.
3. In military affairs, a tent raised on posts. The word is sometimes used for a flag, colors, ensign or banner.
4. In heraldry, a covering in form of a tent, investing this armories of kings.
5. Among jewelers, the under side and corner of brilliants, lying between the girdle and collet.