Go out the window

Hello all,
what do we mean by the following idiom "Go out the window" ?

Thanks in advance!

BRs,

to no longer exist, disappear, particularly in relation to plans one has:

I was planning a hike up Mount Kilimanjaro in summer, but that went out the window when I broke my leg.

Everything he worked for in politics, his whole career, went out the window as soon as the scandal broke.

Many thanks for ur help.

Quote:

---

Originally Posted by David L.

to no longer exist, disappear, particularly in relation to plans one has:

I was planning a hike up Mount Kilimanjaro in summer, but that went out the window when I broke my leg.

Everything he worked for in politics, his whole career, went out the window as soon as the scandal broke.

---