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
