"It is an act that is crucial to success, Draco!" said Snape.
It will be your job to persuade Professor Slughorn to divulge the real memory, which will undoubtedly be our most crucial piece of information of all.
"Why didn’t you confiscate them then?" demanded Harry, it seemed extraordinary that Hermione’s m ania for upholding the rules could have abandoned her at this crucial juncture.
Indeed, I did my best to impress upon you that it is the most crucial memory of all and that we will be wasting our time without it.
I believe that Voldemort is now so immersed in evil, and these crucial parts of himself have been detached for so long, he does not feel as we do.
But now, Harry, armed with this information, the crucial memory you have succeeded in procuring for us, we are closer to the se-cret of finishing Lord Voldemort than anyone has ever been before.
The run-up to this crucial match had all the usual features: members of rival Houses attempting to intimidate opposing teams in the corridors; unpleasant chants about individual players being rehearsed loudly as they passed; the team members themselves either swaggering around enjoying all the attention or else dashing into bathrooms between classes to throw up.
There are no more uses of "crucial" in the book.
Show samples from other sources
Doing well on the SAT is crucial to getting into the college I want to attend.
The information is crucial to making a good decision.