of considerable size or extent

her big hazel eyes

big buildings

big staff cuts

of considerable importance or seriousness

it's a big decision

his biggest problem is money

he made a big mistake

generous

‘I'm inclined to take pity on you.’ ‘That's big of you!’

praise or recommend something highly

the record's been on the streets a while now, but it's still worth bigging up

the major league in a professional sport

the day he made it to the bigs, he forgot every minor league ballpark he ever played in