up on

adjective

Well-informed concerning.

“The tour guide was certainly up on his history.”

Similar
abreastau courantau faitinformed
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Meanings

adjectiveup on (not generally comparable, comparative more up on, superlative most up on)

comparative more up on · superlative most up on

  1. colloquialidiomaticnot comparableusuallyWell-informed concerning.

    The tour guide was certainly up on his history.

    3 more examples

    Maybe you aren't up on current events, but we just got our asses kicked, pal

    1986, Aliens

    Says Sigismondi: "I don't watch [MTV]. I'm really not up on what's trendy."

    2001 June 24, Christopher John Farley, “The New Video Wizards”, in Time

    “She was up on everything,” said the biographer A. Scott Berg. “Not just the news but every play or film or book.”

    2011 August 25, William Grimes, “Casey Ribicoff, Senator’s Widow and a Style Leader, Dies at 88”, in New York Times, retrieved 03 Jan 2012

Synonyms & antonyms

adjectivebeing up to particular standard or level especially in being up to date in knowledge

Similar
abreastau courantau faitinformed
Also see
abreastau courantau faiteruditeknowledgefullearnedsmart

Synonym sets from Open English WordNet, CC BY 4.0.

Cite this entry
APA

up on. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/up%20on

MLA

“up on.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/up%20on. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “up on,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/up%20on.

Source: up on on Wiktionary, CC BY-SA 4.0.