As adjectives the difference between ostentatious and dashy
is that ostentatious is of ostentation while dashy is (colloquial|dated) calculated to arrest attention; ostentatiously fashionable; showy.
ostentatious
English
Adjective
(
en adjective)
Of ostentation.
Intended to attract notice.
Of tawdry display; kitsch.
Synonyms
* (tawdry)
Derived terms
* ostensible
* ostensive
References
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dashy
English
Adjective
(er)
(colloquial, dated) Calculated to arrest attention; ostentatiously fashionable; showy.
Related terms
* dashing