Definitionen
1.VerbTo learn (about something) by reading.
.mw-parser-output .object-usage-tag{font-style:italic}.mw-parser-output .deprecated{color:var(--wikt-palette-grey-lime-8,olivedrab)}[with on or about]
2.Verb.mw-parser-output .object-usage-tag{font-style:italic}.mw-parser-output .deprecated{color:var(--wikt-palette-grey-lime-8,olivedrab)}[with on or about]
3.VerbTo read previous or higher-up messages in a chat; to backread."I just got here, what are you talking about?— It's about the new movie announcement. Read up for the context."
4.AdjectiveOf an individual, well-versed or informed in a particular subject.