I know you're not making it up, "plurality" is a real word and in a technical context "majority" can be contrasted with "plurality". But even then you really wouldn't say "lost the majority vote" for someone who won an election (try searching for that phrase: none of the hits are people using it like you are).

The majority vote is being used often to indicate whether or not majority actually voted in a given President. In the USA however, majority vote win happens infrequently nowadays, only 4 out of last 9 elections with winner won a majority vote. so perhaps unfair to bring that up, the 2024 was an absolute blowout by USA's standards