/ əbˈsiːn; NAmE / adjective
1.
connected with sex in a way that most people find offensive :
obscene gestures / language / books
an obscene phone call (= in which sb says obscene things)
2.
extremely large in size or amount in a way that most people find unacceptable and offensive
SYN outrageous :
He earns an obscene amount of money.
It's obscene to spend so much on food when millions are starving.
► ob·scene·ly adverb :
to behave obscenely
obscenely rich
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WORD ORIGIN
late 16th cent.: from French obscène or Latin obscaenus ill-omened or abominable.