Dorset, as if in obedience to Lily’s imperative bidding, had actually returned in time for a late dinner on the yacht.
That obligation discharged, she would have but a thousand dollars of Mrs. Peniston’s legacy left, and nothing to live on but her own small income, which was considerably less than Gerty Farish’s wretched pittance; but this consideration gave way to the imperative claim of her wounded pride.
There are no more uses of "imperative" in the book.
Show samples from other sources
I’m hoping to be able to reveal this to my father soon enough, but, for tonight, discretion is imperative."
Kiera Cass -- The One
The evolutionary imperative that drove them to live in groups was the opportunity to kill them by the billions.