1.
one's imagination, mere fancy, just thinking too much
Used when something seems to be the case but is probably not real — just a product of one's mind. Often used to dismiss a vague impression or feeling.
気のせいだよ。
You're just imagining things.
A very common everyday expression used to suggest that a perception or feeling is not based in reality. Literally 'because of one's mind/mood.'
Common patterns
- 気のせいだ: it's just one's imagination
- 気のせいか...: maybe it's just me, but...
- 気のせいだと思う: I think it's just my imagination
- 気のせいではない: it's not just one's imagination (confirming something is real)
Usage
気のせいか is often used at the start of a sentence when the speaker is unsure whether their observation is real or subjective. It softens the statement and invites the listener to confirm or deny.