Here's a breakdown of the meaning:
* The rye field: The novel's climax takes place in a rye field. This is where Holden imagines himself as a "catcher in the rye," saving children from falling off a cliff into the dangerous world.
* Through the rye: This phrase represents the journey of innocence and the transition into adulthood. Holden wants to keep children safe and innocent, like the children playing in the rye field, forever.
* The "phony" world: Holden sees the adult world as a place full of phoniness and hypocrisy, where people try to fit in and put on airs. He wants to protect children from this.
So, "through the rye" in the context of the novel represents Holden's longing to preserve innocence and his fear of the corrupting nature of the world.
It's important to note that the phrase is not widely used outside of the novel and its context.