'Perilous' definitions:

Definition of 'perilous'

From: WordNet
adjective
Fraught with danger; "dangerous waters"; "a parlous journey on stormy seas"; "a perilous voyage across the Atlantic in a small boat"; "the precarious life of an undersea diver"; "dangerous surgery followed by a touch- and-go recovery" [syn: parlous, perilous, precarious, touch-and-go]

Definition of 'Perilous'

From: GCIDE
  • Perilous \Per"il*ous\, a. [OF. perillous, perilleus, F. p['e]rilleux, L. periculosus. See Peril.] [Written also perillous.]
  • 1. Full of, attended with, or involving, peril; dangerous; hazardous; as, a perilous undertaking. [1913 Webster]
  • Infamous hills, and sandy, perilous wilds. --Milton. [1913 Webster]
  • 2. Daring; reckless; dangerous. [Obs.] --Latimer. [1913 Webster]
  • For I am perilous with knife in hand. --Chaucer. [1913 Webster] -- {Per"il*ous*ly}, adv. -- {Per"il*ous*ness}, n. [1913 Webster]