A bolt from the blue meaning in Bengali? A bolt from the blue idiom এর বাংলা অর্থ কি? A bolt from the blue = বিনা মেঘে বজ্রপাত, সম্পূর্ণ অপ্রত্যাশিত( An unexpected calamity). Some sentences using the idiom “A bolt from the blue”: His early death was a bolt from the blue. This event was a…