All 9 Uses

crucial
in
A Hope in the Unseen
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She had been made a junior missionary at the church, and being with her Lavar in these crucial years ("when," as she'd often say, "a child either gets the love he needs or he doesn't") was part of a reordering of her priorities.†
Chpt 2

crucial = very important
No one understands that this is the crucial moment for a show of academic force, a display of pure will.†
Chpt 3 *
This is Cedric's standard line-he's been saying it as a sort of half-apology since he arrived in ninth grade and realized that with so little work being done during class time, extra-credit projects would be crucial to learning anything.†
Chpt 3
Money is crucial.†
Chpt 5
'The pregnancy came at a crucial time in her life.†
Chpt 10
Gradually discovering some confidence in social interactions may be crucial to his sense of selfworth, but a companion measure of self-worth, the one tied to academic performance, will be tested in the coming week's midterms.†
Chpt 13
The crucial moment in this project, however, was when Cedric's path curved into the freshman class at Brown University.†
Chpt A.N.
In either case, all the internal voice passages, crucial to understanding various points of view, are drawn from literally dozens of interviews with each of a dozen main characters stretching over several years.†
Chpt A.N.
I am, as well, eternally fortunate to have an agent and friend, Kris Dahl, whose flawless guidance was crucial to the launch and trajectory of this project.†
Chpt A.N.

Definitions:

(1) (crucial)
very important or necessary -- often because it determines how something else will turn out
(2) (meaning too rare to warrant focus)