/ ˌɒstenˈteɪʃn; NAmE ˌɑːs-/ noun
[ U ] ( disapproving ) an exaggerated display of wealth, knowledge or skill that is made in order to impress people
••
WORD ORIGIN
late Middle English : via Old French from Latin ostentatio(n-) , from the verb ostentare , frequentative of ostendere stretch out to view.