首楞嚴義疏注經 2.470

2.470

此皆妖星，其光似帚，孛孛然起。絕跡而去曰飛，光跡相連曰流。

These are all portentous stars: their light resembles a broom, flaring up profusely. Trailing off without a trace is called flying ('shooting star'); light continuing in a joined trail is called flowing ('meteor stream').