A self-contained group of friends, family or colleagues capable of providing help, especially when one of the group is in isolation

plural of bubble wrap

To cover in bubble wrap / (figuratively) To excessively protect

Empty-headed; foolish.

plural of flight bubble

An arrangement between two countries, states, or other administrative regions, that allows free air travel of residents between them while otherwise keeping their borders closed to travellers from outside the bubble.

(intransitive) To be successful on a modest scale, without yet being fully established

(Australia) drinking fountain

plural of bubble tap

(UK politics, derogatory) The collective group of Members of Parliament, civil servants, lobbyists, etc., seen as out of touch with the realities of life outside Parliament.