Definition Of frightful
very unpleasant, serious, or shocking.
there's been a frightful accident
Example Of frightful
A frightful accident occurred at the Gatehead Mill, Delph, Saddleworth yesterday afternoon.
After a frightful glare she had directed to our corner during the French lesson, I had a good reason for thinking, ‘Here comes trouble.’
But most important, Schatzberg and company have made The Panic in Needle Park an occasion for the American public to meditate upon the frightfulness of heroin addiction.
Electromagnetic pollution, which has been described as a serious killer in the office, actually is not frightful at all, say experts.
Going by eyewitnesses' accounts of this mysterious person's frightful appearance, he is referred to as ‘acid man’.