Definition of breathtaking adjective from the Oxford Advanced American Dictionary

 

breathtaking

 adjective
adjective
NAmE//ˈbrɛθˌteɪkɪŋ//
 
 
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very exciting or impressive (usually in a pleasant way); very surprising a breathtaking view of the mountains The scene was one of breathtaking beauty. He spoke with breathtaking arrogance.
breathtakingly
 
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adverb a breathtakingly expensive diamond
See the Oxford Advanced Learner's Dictionary entry: breathtaking