I've been googling to find the differences among the words: gathering, get-together, and meeting.
I found meanings of the three words from Collins:
A get-together is an informal meeting or party, usually arranged for a particular purpose.
A gathering is a group of people meeting together for a particular purpose.
A meeting is an event in which a group of people come together to discuss things or make decisions.
The dictionary definitions seem not much different but from the various articles, I gathered that three words might be ordered by the formality of the event:
meeting > gathering > get-together
And it seems also that gathering and get-together are not for the business world. In the business, it has to be meeting. I also think that get-together is a smaller scale than gathering. But I'm not sure about my conclusions. Fix me if I'm thinking in the wrong way.
And here are some cases that I'm not sure of suitable words to call the events:
If teenage students meet together to do homework home, is this gathering or meeting?
If you go to drink with several of your friends, is this get-together?
If you meet with your friends for lunch with homemade food, is this gathering or get-together?
If you meet with your neighbors to discuss community problems, is this gathering or meeting?