I. sto ‧ ry ‧ book 1 /ˈstɔːribʊk/ BrE AmE noun [countable]
a book of stories for children:
colourful storybooks
II. storybook 2 BrE AmE adjective
storybook ending/romance etc an ending etc that is so happy or perfect that it is like one in a children’s story SYN fairytale :
It would have been storybook stuff if he had won the competition.