- The definition of astonish is to amaze someone.
The effect a trapeze artist has on an audience is an example of astonish.
astonish definition by Webster's New World
Origin: altered ; from Middle English astonien ; from Old French estoner ; from Vulgar Latin an unverified form extonare (for Classical Latin attonare) ; from ex-, intensive plush tonare, to thunder
astonish definition by American Heritage Dictionary
transitive verb as·ton·ished, as·ton·ish·ing, as·ton·ish·es
Origin: Alteration of Middle English astonen, from Old French estoner, from Vulgar Latin *extonāre : Latin ex-, ex- + Latin tonāre, to thunder; see (s)tenə- in Indo-European roots.
- a·stonˈish·ing·ly adverb