Definition of be bursting
1 : to be filled with something <The crate was bursting with fruit.> <The dish is bursting with flavors.> <Her parents were practically bursting with pride.>
2 : to want very much to do (something one is not yet able to do) <I'm bursting to tell you the news, but I have to talk to Ken first.>
3 British, informal : to need to urinate very badly
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