The full form of HEA is happily ever after
The internet slang term HEA is an acronym that means the phrase “happily ever after.” This phrase simply means to spend the rest of one’s life in true happiness.

Origin of HEA
There is no specific origin information provided on the exact year that HEA became an acceptable internet slang acronym for the phrase “happily ever after.” One can only assume that over time as texting and communicating over the internet via social media and other platforms became a popular form of communication, the abbreviation was adopted and the definition inherently understood after excessive use by many people.

Other Meanings
The acronym HEA has several other meanings. There are way too many to list here individually, but the HEA acronym can also stand for the Higher Education Act of 1965, Home Energy Assessment, Higher Education Authority, Health Education Authority, Hockey East Association, Humanitarian and Emergency Affairs, Hyundai Electronics of America or Human Engineering Assessment. Again, these are just a handful of some of the things this acronym can stand for. However, in typical situations of use on the internet, “happily ever after” is usually a safe bet to assume that’s what a person means rather than these more technical meanings.

Example Conversations
A text conversation between two friends.

Friend 1: I hope that Blake and I last forever.
Friend 2: I am sure you will if you both are dedicated to the relationship.
Friend 1: Well, I know I am. I think he is too.
Friend 2: Then as long as it stays that way the two of you will live HEA!