All 3 Uses

strait
in
Gone with the Wind
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But now, even the most strait laced felt that patriotism called upon them to be more broad minded.†
Chpt 2.12
Oh, men are so conceited they'll believe anything that flatters them......I must never let him dream what straits we're in, not till I've got him.†
Chpt 4.32 *
Any time she wanted to fill her house with guests, she could do so and these guests would be far more entertaining, far more handsomely dressed than those prissy, strait-laced old fools who disapproved of her.†
Chpt 5.49 *

Definitions:

(1) (strait as in: Strait of Hormuz)
a narrow channel of the sea joining two larger bodies of water
(2) (strait as in: put her in a tough strait)
a bad or difficult situation
(3) (meaning too rare to warrant focus)
Less commonly, strait can mean narrow or cramped -- as used in the compound word straitjacket. Similarly, it can mean rigid as in strait-laced.

These words are sometimes spelled straight*, but strait is a different word than straight -- which has many meanings.