1. Athletic activity involving vaulting, jumping, somersaults and other acrobatic movements to negotiate obstacles; usually performed in an urban area using street architecture, jumping between buildings, etc.

Encyclopedia: Free running

• adduction
• adductive
• adductor
• adductor muscle
• ade
• Adelaide
• Adelges
• Adelges abietis
• Adelges piceae
• adelgid
• Adelgidae
• Adelie
• Adelie Coast
• Adelie Land
• Adelie penguin
• Adeline Virginia Stephen Woolf
• ademption
• Aden
• Aden-Abyan Islamic Army
• Adenanthera
• Adenanthera pavonina
• Adenauer
• adenine
• adenitis
• Adenium