A bean is a seed you can eat. You might love garbanzo beans but detest large, green lima beans.
When you order rice and beans at a Mexican restaurant, you get a plate full of deliciously spiced, slightly mashed pinto or black beans. You might plant beans in your garden, vine-like climbing plants that grow pods with beans inside. Coffee and chocolate are both foods that start out as beans. If someone beans you during a softball game, it means they hit you with the ball, usually in the head — also colloquially called a bean.