Fright is a feeling of fear, dread, or terror. You might scream in fright while watching a scary movie or riding a roller coaster.
Some fright is so intense that it makes you jump; other fright is caused by anticipating something vaguely scary, like a trip to the dentist or an encounter with your mean neighbor after your baseball breaks her window. Although it's old fashioned, you can also use fright as a verb, to mean "cause fear." The Old English root of fright is fyrhtu, "fear, dread, trembling, or horrible sight."