bean

1 bean /ˈbiːn/ noun
plural beans
1 bean
/ˈbiːn/
noun
plural beans
Britannica Dictionary definition of BEAN
[count]
1 
a  : a seed that is eaten as a vegetable and that comes from any one of many different kinds of climbing plants
b  : a part of a plant that contains very young seeds and that is eaten as a vegetable — see also green bean, pole bean, snap bean, string bean, wax bean
c  : a plant that produces beans
2 
: a seed that looks like a bean but that does not come from a climbing plant — see also jelly bean, jumping bean

a hill of beans

— see hill

full of beans

informal
1 
: full of energy and life
2 
US : not correct or truthful : full of nonsense

not know beans about

US, informal
: to not know anything about (something)

spill the beans

informal
: to reveal secret information
2 bean /ˈbiːn/ verb
beans; beaned; beaning
2 bean
/ˈbiːn/
verb
beans; beaned; beaning
Britannica Dictionary definition of BEAN
[+ object] informal
: to hit (someone) on the head with something