What does “push to the back of your mind” mean?

to try to forget about sth unpleasant

How is “push to the back of your mind” used?

In Downton Abbey: A New Era (2022), one line is: “'Lying' is a harsh word. Maybe she pushed it to the back of her mind.”

The clip at the top of this page is from Downton Abbey: A New Era (2022).

'Lying' is a harsh word. Maybe she pushed it to the back of her mind.

1 作品で登場 · 1 本目