# in one's head

> English word · Prep_phrase

## Definitions
1. Used other than figuratively or idiomatically: see in, one's, head.
2. Within one's intellect, memory, or mind.
3. Within one's imagination; without basis in reality.
4. Mentally.
5. Anxious due to overthinking an issue.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/in-one-s-head