Any reptile of the order Ophidia; a snake, especially a large snake. See Illust. under Ophidia.
- A reptile of the order Serpentes; a snake.
- In the Bible, the creature that tempted Eve.
- A subtle, sly, or treacherous person.
- A firework that writhes while burning.
- Music A deep-voiced wind instrument of serpentine shape, used principally from the 17th to 19th century, about 2.5 meters (8 feet) in length and made of brass or wood.