large in size or amount:
He's a big man.
Could I try these shoes in a bigger size?
They have a big house in the country.
She has blonde hair and big blue eyes.
She had a big pay rise.
great big I had a great big slice of chocolate cake for dessert.
biggest ever A thousand people took part in the region's biggest ever cycle race.
informal You write August with a big (= capital) "a".
big spender informal She's always been a big spender (= she has always spent a lot of money).
big eater informal You're not a very big eater, are you? (= You do not eat a lot.)
older or more like an adult:
big brother Her big (= older) brother told her to go away.
big sister Her big (= older) sister drove her to school.
big enough I'm ashamed of you. You're big enough to know better (= at an age where you should know that your behaviour is not acceptable).
used to add emphasis:
You're a big bully!