| 1. | Psychology. the illusion of having previously experienced something actually being encountered for the first time. |
| 2. | disagreeable familiarity or sameness: The new television season had a sense of déjà vu about it—the same old plots and characters with new names. |

The strange sensation that something one is now experiencing has happened before: “I knew I had never been in the house before, but as I walked up the staircase, I got a weird sense of déjà vu.” From French, meaning “already seen.”