Definition of "HEA"

HEA

noun
plural HEAs
1. Initialism of high-entropy alloy.
2. Initialism of happily ever after.
  Quotations
  There's much debate over what is more powerful: historical romance that finds an HEA in spite of such truths and in the context of the past, or one that chooses to gift its characters an escapist fantasy generally the domain of white protagonists.
  2022 August 30, Maureen Lee Lenker, “Hot Stuff: The summer's 8 best romance novels are thrilling, fun, and resonant romps”, in Entertainment Weekly‎
proper noun
1. (UK, education) Initialism of Higher Education Academy.
adverb
not comparable
1. (fandom slang) Initialism of happily ever after.