Adjective

(en adjective)

Very loud; suggestive of thunder; thundersome

*

*:But when the moon rose and the breeze awakened, and the sedges stirred, and the cat's-paws raced across the moonlit ponds, and the far surf off Wonder Head intoned the hymn of the four winds, the trinity, earth and sky and water, became one thunderous symphony—a harmony of sound and colour silvered to a monochrome by the moon.

*{{quote-news, year=2012, date=May 13, author=Alistair Magowan, work=BBC Sport

, title= Sunderland 0-1 Man Utd , passage=After the hour mark, events in Manchester were almost becoming a distraction such was the thunderous cheer from the United fans to greet QPR taking their unlikely lead against City.}}

Adjective

(wikipedia undefined) (-)

Lacking a definition or value.

(mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.

The result of division by zero is undefined .