noun - the process by which something becomes fossilized; often used literally for bones or plants turning into fossils, or metaphorically for ideas or behaviors becoming fixed and unchanging
noun - a person in the past, usually an older or responsible one, who accompanies and looks after someone, especially a young woman or group, to ensure proper behaviour
noun, technical - a small, enclosed field used especially for keeping or exercising horses; an enclosed area at a racecourse where horses are paraded, saddled, and mounted before a race