1. (informal) to act or begin too soon or without due caution 
2. To begin a race too soon, before the starting gun goes off

Derived forms: jumped the gun

• amorphous
• amorphous shape
• amorphousness
• amort
• amortisable
• amortisation
• amortise
• amortizable
• amortization
• amortize
• Amos
• amount
• amount of money
• amour
• amour propre
• amoxicillin
• Amoxil
• Amoy
• amp
• amperage
• ampere
• ampere-hour
• ampere-minute
• ampere-second
• ampere-turn