all in one's head

idiom

: in one's imagination : not real
The problem is all in his head.

Dictionary Entries Near all in one's head

Cite this Entry

“All in one's head.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/all%20in%20one%27s%20head. Accessed 29 Nov. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!