In German
auf
Meaning: on (top of a horizontal surface); at (an event)
Example sentences
DieKatzespringtaufdenTisch.
The cat jumps onto the table.
DieKatzeliegtaufdemTisch.
The cat lies on the table.
WirsehenunsaufderParty.
We'll see each other at the party.
Grammar note
“Auf” is two-way: Akkusativ for movement onto a surface, Dativ for already being there. It's also used idiomatically for events: “auf der Party” (at the party).
Common mistake
Don't confuse “auf” (on top of a horizontal surface) with “an” (against a vertical surface or edge). A book is “auf dem Tisch”, but a picture is “an der Wand”.
Quick check
Which preposition means “on top of” a horizontal surface?
More words on this topic
Keep learning German
Practise it in a lesson →Frequently asked questions
What's the difference between “auf” and “an”?
“Auf” is for horizontal surfaces (on top), “an” is for vertical surfaces or edges (against).
How do I say “at the party” in German?
“Auf der Party”, using Dativ since you're already there.