Foregather
/ˌfɔːrˈɡæðər/
Definition 1 of 1
Pro Tip 1/3Group Intent
Use 'foregather' when people meet for a shared purpose or goal. 
Activists foregather to strategize for the upcoming protest.
Pro Tip 2/3Planned Event
'Foregather' implies a sense of planning, less spontaneous than 'meet up'. 
Scholars will foregather at the conference on renewable energy.
Pro Tip 3/3Formality Level
'Foregather' is formal and not commonly used in casual conversation. 
The board members will foregather to appoint a new CEO.