Ok babe. Is merriam webster ok?
1 a: a number or percentage equaling more than half of a total majority of voters
b: the excess of a majority over the remainder of the total
c: the greater quantity or shares
3 : the group or political party having the greater number of votes (as in a legislature)
And for good measure a relevant use of the word:
Jeremy Corbyn is now widely seen as a lost cause, particularly after a week in which the chief rabbi accused him of anti-Semitism and a large poll suggested the Tories could win a majority of 68.— The Economist, "Jeremy Corbyn’s political agenda is more radical than his economic one," 30 Nov. 2019