penny

penny /ˈpɛni/ noun
plural US pennies /ˈpɛniz/ or British pence /ˈpɛns/
penny
/ˈpɛni/
noun
plural US pennies /ˈpɛniz/ or British pence /ˈpɛns/
Britannica Dictionary definition of PENNY
[count]
1 
a  plural pennies : a coin or a unit of money equal to ¹/₁₀₀ of a dollar : cent
b  plural pence : a coin or a unit of money equal to ¹/₁₀₀ of a British pound — abbreviation p
c  plural pence : a British coin used before 1971 that was equal to ¹/₁₂ of a shilling — abbreviation p
2 
a  : a small amount of money
b  : the least amount of money

(a) penny for your thoughts

— used to ask what someone is thinking about

a penny saved

◊ The saying a penny saved (is a penny earned) means that it is important to save your money.

a pretty penny

: a large amount of money

in for a penny, in for a pound

British
— used to say that you should finish what you have started to do even though it may be difficult or expensive

not a penny less/more

: no less or no more than a certain amount of money

pinch pennies

— see 1pinch

ten a penny

— see ten

the penny drops

British, informal
— used to say that someone finally understands something after not understanding it for a time