›to prepare a full report, document, etc. to record ideas, discussions, or meetings you had earlier: I need to write up the minutes of the meeting.
›ACCOUNTING, FINANCEto show an increase in the value of an asset in a company's accounts, usually because it is now worth more than previously shown: Companies should allocate a specific value to intangible assets rather than just being able to write them up as goodwill. → See alsowrite-up → Comparewrite sth down