Biking/ˈbaɪkɪŋ/ Definition 1 of 2Pro Tip 1/3Activity Context Used to describe a leisure or fitness activity typically done outdoors. Joining a biking club can improve your health. Pro Tip 2/3Recreation or Sport Can refer to casual riding or competitive sports like BMX or racing. Mountain biking is my favorite sport. Pro Tip 3/3Non-Motorized Implies using a bicycle that is powered by pedaling, not a motor. Biking in the countryside gives me a sense of freedom.