noun

1. any of various leguminous plants; esp., any of several species of a genus (Phaseolus) of the pea family, including the kidney bean and lima bean
2. the edible, smooth, kidney-shaped seed of any of these plants
3. a pod with such seeds, eaten as a vegetable when still unripe
4. the bean-shaped seed of some other plants coffee bean
5. any of these other plants castor bean tree
6. ☆ Slang the head, brain, or mind
7. ☆ Slang even a small amount: used in negative constructions not to know beans about something

Etymology: ME ben < OE bean; akin to ON baun, Ger bohne < ? IE *bhabhā > L faba, bean

transitive verb

1. Slang to hit on the head
2. Baseball to hit (a batter) on the head with a pitched ball