So, depending on the context, "prenez" can mean:
* Take (imperative plural): "Take (you all)"
* Take (indicative plural): "They take" or "You (formal) take"
For example:
* Prenez vos places. (Take your seats.)
* Ils prennent leur petit déjeuner. (They are taking their breakfast.)
* Prenez soin de vous. (Take care of yourselves.)