Also found in: Thesaurus.
tr.v. stu·pe·fied, stu·pe·fy·ing, stu·pe·fies
1. To cause (someone) to be unable to think clearly or be sensitive to the surroundings; daze: was stupefied by the toxic gas.
2. To amaze; astonish: a race that stupefied the fans.
[Middle English stupefien, from Old French stupefier, from Latin stupefacere : stupēre, to be stunned + facere, to make; see fact.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.