the edible nutritious seed of various plants of the legume family, esp. of the genus Phaseolus.

a plant producing such seeds.

the pod of such a plant, esp. when immature and eaten as a vegetable.

any of various other beanlike seeds or plants, as the coffee bean.

Slang .

a person's head.

a coin or a bank note considered as a coin

I can't pay for the ticket, I don't have a bean in my jeans.

British Informal . a minimum amount of money

They've been disinherited and now haven't a bean.

beans, Informal . the slightest amount

He doesn't know beans about navigation.

Slang . to hit on the head, esp. with a baseball.

beans, (used to express disbelief, annoyance, etc.). ?

full of beans

Informal .

energetic; vigorously active; vital

He is still full of beans at 95.

stupid; erroneous; misinformed.

spill the beans, Informal . to disclose a secret, either accidentally or imprudently

thereby ruining a surprise or plan

He spilled the beans, and she knew all about the party in advance.

noun

kernel , seed , berry , nugget , grain , noddle , pate , poll , brain , caster , flageolet , frijol , frijole , haricot , head , kidney , legume , lentil , lima , mung bean , noggin , skull , tofu