all in one's mind
phrase
: existing only in one's imagination
He thinks he's very sick, but it's all in his mind.
Cite this Entry
“All in one's mind.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/all%20in%20one%27s%20mind. Accessed 12 Dec. 2025.
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Merriam-Webster unabridged
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