1. straps on a horse’s harness that prevent the horse from rearing by connecting the girth to the noseband or bit
Usage: equestrian
2. a betting system where the stake is doubled after each loss
Usage: gambling
3. a mathematical sequence of random variables with specific conditional expectation properties
Usage: mathematics; probability theory

Examples

• The trainer adjusted the martingales to keep the young horse from throwing its head back.
• Running martingales give the horse more freedom of movement than standing ones.
• Many casinos ban the martingale betting strategy because it can lead to huge losses.
• He lost his entire bankroll using the martingale system at the roulette table.
• The mathematician studied martingales to understand fair game theory.
• Martingales are fundamental concepts in modern probability theory.