Aga'st. adj. [This word, which is usually, by later authors, written aghast, is, not improbably, the true word derived from agaze, which has been written aghast, from a mistaken etymology. See Aghast.]
Struck with terrour; amazed; frighted to astonishment.
Thus roving on
In confus'd march forlorn, th' advent'rous bands,
With shudd'ring horrour pale, and eyes agast,
View'd first their lamentable lot, and found
No rest. Milton's Paradise Lost, b. ii. l. 616.