Learn French: Nous allons revoir nos amis. - We are going to see our friends again.

This sentence uses the near future tense, which is built using the present tense of aller (here, allons) plus an infinitive. So revoir stays in its unconjugated infinitive form to mean "to see again."

Is revoir just the verb voir with a prefix?

Yes! Adding re- in front of a French verb often means doing the action again. Since voir means "to see," revoir means "to see again." When you do need to conjugate it, it follows the exact same irregular pattern as voir.

Why is the word for "our" nos here instead of notre?

You choose between notre and nos based on whether the following noun is singular or plural. Since amis (friends) is plural, you must use nos. If it were just one friend, it would be notre ami.

Do I pronounce the "s" at the end of nos?

Normally the "s" is silent, but here it is pronounced as a "z" sound because it links to the vowel at the start of amis. This linking is called a liaison, making the two words sound together like "no-zah-mee."