write up

write up (third-person singular simple present writes up, present participle writing up, simple past wrote up, past participle written up) (transitive)

1. Used other than figuratively or idiomatically: see write,‎ up.

   I can't write up in the attic; it's too cold there in the winter and too hot there in the summer.

2. To produce by writing.

   Synonyms: write down, record, transcribe

   The supervisor wrote up the personnel report about him.

3. To document officially the faults, offenses, or wrongdoing of.

   Synonym: write down

   His supervisor wrote him up after their last argument.

   See also: cite

4. To write about positively; to praise in writing.

   Antonym: write down

   The paper wrote up the team's prospects.

   See also: talk up

5. (transitive, accounting) To make an upward adjustment in the value of an asset.

   Antonyms: write down, devalue

6. (philately) To annotate a stamp album page with details about the stamp, such as die used or colour variety.

• In the sense "produce by writing", this term is generally used only when the thing being written has been previously set or arranged to some extent. Thus, one can write up a report of events, minutes of a meeting, or a contract previously agreed upon orally.
• As with many pairs of phrasal verbs that contain antonymic particles (such as up and down), write up and write down can actually function as synonyms for some senses.