'Foulder' definitions:
- Foulder \Foul"der\, v. i. [OE. fouldre lightning, fr. F. foudre,
OF. also fouldre, fr. L. fulgur. See Fulgor.]
To flash, as lightning; to lighten; to gleam; to thunder.
[Obs.] "Flames of fouldering heat." --Spenser.
[1913 Webster]