a. [ L. tremendus that is to be trembled at, fearful, fr. tremere to tremble. See Tremble. ] Fitted to excite fear or terror; such as may astonish or terrify by its magnitude, force, or violence; terrible; dreadful; as, a tremendous wind; a tremendous shower; a tremendous shock or fall. [ 1913 Webster ]

A tremendous mischief was a foot. Motley. [ 1913 Webster ]

Syn. -- Terrible; dreadful; frightful; terrific; horrible; awful. [ 1913 Webster ]

-- Tre*men"dous*ly, adv. -- Tre*men"dous*ness, n. [ 1913 Webster ]