English definition of “big”
/bɪg/ adjective (bigger, biggest)
SIZE › large in size or amount: I come from a big family. We're looking for a bigger house.
IMPORTANT › important or serious: Tonight's big game is between Real Madrid and Manchester United. Buying that car was a big mistake.
your big brother/sister informal › your older brother/sister
SUCCESSFUL informal › successful or popular: The programme's been a big hit (= very popular) with young children.
make it big informal › to become very successful or famous