Meaning of the word "on end" in English

What does "on end" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

on end

US /ɒn ɛnd/
UK /ɒn ɛnd/

Idiom

1.

for a long period of time without stopping

Example:
He worked for ten hours on end.
It rained for three days on end.
2.

in an upright position

Example:
The books were stacked on end.
He stood the broom on end in the corner.