vagueidea
nounUK /veɪɡ aɪˈdɪə/
US /veɪɡ aɪˈdiːə/
A thought that is not clear in your mind yet.
I have a vague idea of what the story is about, but I need to read it again.
OTHER MEANINGS
2. A plan that is not fully worked out.
We had a vague idea for the school trip but no details yet.
3. A memory that is not sharp or complete.
She had only a vague idea of where she left her keys.
4. A general sense of something without exact knowledge.
He had a vague idea that the answer was three, but he was not sure.