lose one's mind
1 of 2phrase (1)
: to become mentally ill : to go insane
I feel like I'm losing my mind.
lose one's mind/sanity
2 of 2phrase (2)
: to become insane
She wondered if she was losing her mind/sanity.
Cite this Entry
“Lose one's mind.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lose%20one%27s%20mind. Accessed 14 Jun. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
