Learn Hardcore German: Wir treffen uns in der Halle.

Wir treffen uns literally: We meet ourselves, but it actually means: We meet (each other).
Without uns, Wir treffen would need an object: Wir treffen ihn (We meet him), Wir treffen sie (We meet her/them).

So:

Wir treffen uns = we meet each other.
Wir treffen sie = we meet her / them.
Ich treffe ihn = I meet him.

Is treffen always reflexive with people?

Not always. It depends on the meaning:

Meeting someone:
- Ich treffe meinen Freund. – I (will) meet my friend.
  No reflexive pronoun, because the object is meinen Freund.
Meeting each other (reciprocal meaning):
- Wir treffen uns. – We (will) meet (each other).
  Reflexive pronoun uns replaces “each other”.
Accidentally hitting something:
- Ich treffe die Wand mit dem Ball. – I hit the wall with the ball.
  Again, no reflexive pronoun.

So treffen is not inherently reflexive, but it often becomes reflexive with plural subjects like wir / ihr / sie, when the idea is “each other”.

What exactly does uns mean here?

Uns is the 1st person plural pronoun in the accusative (and dative) case. It means us.

In Wir treffen uns, it is:

Same people as wir.
Accusative object of treffen.
Function: expresses the reciprocal meaning “each other”.

So the structure is:

Wir = subject (we)
treffen = verb (meet)
uns = object (each other / ourselves)

What is the word order pattern in Wir treffen uns in der Halle?

The sentence follows standard main-clause word order:

Wir – subject in first position.
treffen – conjugated verb in second position.
uns – object pronoun in the “middle field” after the verb.
in der Halle – adverbial (prepositional phrase) of place at the end.

Basic pattern:

Subject – Verb – (Object) – (Time/Manner/Place)

Here we just have Subject – Verb – Object – Place.

Why is it in der Halle and not in die Halle?

The preposition in can take either accusative or dative, depending on the meaning:

Accusative (Wohin? – where to?): movement into something
- Wir gehen in die Halle. – We go into the hall.
Dative (Wo? – where?): location, no movement
- Wir treffen uns in der Halle. – We meet in the hall (already there / meeting takes place there).

In Wir treffen uns in der Halle, you are talking about where the meeting happens, not about going there, so you use dative → der Halle.

Why is it der Halle if Halle is feminine?

Because of case.

Halle is feminine.
The definite article for feminine nouns:
- Nominative: die Halle
- Accusative: die Halle
- Dative: der Halle
- Genitive: der Halle

The preposition in here answers “Where?” (location), so it triggers the dative case:

in der Halle (in the hall) – dative feminine.

So der here is the dative feminine article, not the masculine nominative article.

What does Halle generally mean in German?

Halle can mean several kinds of “hall” or large indoor space, depending on context:

Sports hall / gym: Sporthalle, Turnhalle
Concert or event hall: Konzerthalle, Festhalle
Factory hall / warehouse-like building: Fabrikhalle, Lagerhalle

If someone just says in der Halle, the exact type of hall is usually clear from the situation (e.g. you both know which building you mean).

Could you also say Wir werden uns in der Halle treffen?

Yes, grammatically that’s fine:

Wir treffen uns in der Halle.
Wir werden uns in der Halle treffen.

Both can refer to the future. In everyday German, the present tense is very often used for future plans:

Wir treffen uns morgen in der Halle. – We’ll meet in the hall tomorrow.

Use werden mainly when you:

want to emphasize the futurity,
or need to avoid ambiguity.

But in normal planning talk, present tense is more common and more natural.

Can Wir treffen uns in der Halle ever mean “We meet in the hall (regularly / habitually)”?

Yes. The German Präsens (present tense) can express:

Present / regular habit
- Wir treffen uns jeden Montag in der Halle.
  We meet every Monday in the hall.
Future plan
- Wir treffen uns morgen in der Halle.
  We will meet tomorrow in the hall.

Context (time expressions like jeden Montag, morgen, etc.) decides whether it’s habitual, present, or future.

Where else can uns go in the sentence? Is the position fixed?

In a simple main clause like this, uns is in the most natural position.

General rules:

Short pronouns (like uns) tend to come early in the “middle field”, right after the verb, before longer phrases.

Examples:

Wir treffen uns heute in der Halle.
Wir treffen uns in der großen Halle.

You could sometimes move things around, but most alternatives either sound unnatural or emphasize something:

Wir treffen uns in der Halle heute. – possible, but a bit marked; puts slight emphasis on heute.

Moving uns away from right after the verb usually sounds strange:

✗ Wir uns treffen in der Halle. – wrong word order in a main clause.

How would I turn this into a yes/no question?

For a yes/no question, the conjugated verb goes first:

Treffen wir uns in der Halle?
Are we meeting in the hall?

Word order:

treffen – verb (1st position)
wir – subject
uns – reflexive pronoun
in der Halle – place

How would I say “We’ll meet them in the hall” instead?

Change the object pronoun:

Wir treffen sie in der Halle.

Here:

wir = we (subject)
treffen = meet
sie = them (accusative object)
in der Halle = in the hall

No reflexive pronoun, because now you’re meeting some other people, not each other.

How do I say “We met in the hall” in the past tense?

Two common ways:

Conversational past (Perfekt) – very common in spoken German:
- Wir haben uns in der Halle getroffen.
Simple past (Präteritum) – more written / narrative style:
- Wir trafen uns in der Halle.

Both mean: We met in the hall.

Is there a special form to say “Let’s meet in the hall” in German?

You can use the wir-imperative form of the verb:

Treffen wir uns in der Halle. – Let’s meet in the hall.

In practice, people often use a “future-ish” present tense with a time expression, which sounds softer and very natural:

Wir treffen uns in der Halle, okay? – We’ll meet in the hall, okay?
Dann treffen wir uns in der Halle. – Then we’ll meet in the hall.

Avoid Lass uns in der Halle treffen without an object; that sounds incomplete in German (“Let us meet in the hall” needs whom you’re meeting). For “let’s meet”, Wir treffen uns … or Treffen wir uns … is the idiomatic choice.