Preposterous Meaning in Bengali. Preposterous Definition and Example. "English to Bangla Preposterous". Google Translate Preposterous. Menaing in Hindi. Preposterous Meaning in Bengali:ভ্রান্ত, অসম্ভব, অসঙ্গত, উটকা, উটকো Preposterous Meaning in Hindi:निरर्थक, बेहूदा, ऊटपटांग, निस्सार Word Type: Adjective / বিশেষণ / विशेषण