Definition of aghast adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//əˈɡɑːst//
; NAmE NAmE//əˈɡæst//
[not before noun] Surprise
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filled with horror and surprise when you see or hear something synonym horrified Erica looked at him aghast. aghast at something He stood aghast at the sight of so much blood. See related entries: Surprise Word Originlate Middle English: past participle of the obsolete verb agast, gast ‘frighten’, from Old English gǣsten. The spelling with gh (originally Scots) became general by about 1700, probably influenced by ghost; compare with ghastly.
See the Oxford Advanced American Dictionary entry: aghast