"Lunch" vs "luncheon" [closed]

What is the difference between lunch and luncheon? Is it just American spelling vs British spelling, or do they have some sort of formal/professional touch to them, say, a casual midday meal with friends is called lunch while that with your colleagues/business clients is called luncheon?

Solution 1:

Precisely.

luncheon: a light meal of more formal character usually for a group of people in a public dining room (as at a club meeting or a business meeting)

lunch: a: a light meal usually in the middle of the day : LUNCHEON b : a light meal taken at any time of the day or night at a selected place

[Merriam-Webster Unabridged]