All 3 Uses

preemptive
in
Gone Girl
(Auto-generated)

Or he's already done something and he is being preemptively sweet for when I find out.†
p. 171.2
But while I was gathering the guts, Amy had preempted me with her speech about still loving me (lying bitch!)†
p. 241.2
The cheating, that had been preemptive, a subconscious reaction to five years yoked to a madwoman: Of course I'd find myself attracted to an uncomplicated, good-natured hometown girl.†
p. 271.6 *

Definitions:

(1) (preemptive)
done before something undesired happens to prevent it from happening
(2) (meaning too rare to warrant focus)
The form, preempt can also mean to replace something (typically less important). For example, "The President's speech will preempt our regular broadcast."

Preemptive rights refers to contractual rights that give a party the opportunity to take action (such as buying shares) before others.

In the card game bridge a preemptive bid is an early (usually opening) bid that is so high it interferes with opponents opportunity to exchange information by bidding.