Mum, Dad, Nan, and the rest of them

Nine people and three ways to put it. "World's best" is the line everyone says, set properly rather than printed on a mug. "Best ever" is the same sentiment with more shouting. The dictionary entry is the one that takes a minute of thought and lands hardest, because the definition is yours to write - and the role on every one of them is a word you can change, so a stepdad, a godmother or a Nanna gets the same cover with the right name on it.