v.1. To set something down in writing: I wrote down all my thoughts in a journal. If you remember the address, write it down before you forget it again!
2. To reduce something in rank, value, or price: The store is writing down all obsolete inventory. When the tickets didn't sell, we wrote them down to half price.
3. To disparage something in writing. Used chiefly in the passive: The movie was written down in all the newspapers.
4. To write in a conspicuously simple or condescending style: The author wrote down to the unsophisticated audience.