From Longman Dictionary of Contemporary Englishbe/mean everything (to somebody)be/mean everything (to somebody)IMPORTANTto be the most important thing in someone’s life Money isn’t everything. His children mean everything to him. → everything
Examples from the Corpus
be/mean everything (to somebody)• On the other hand, a word can not mean everything and something at the same time.• Does that mean everything deserves a Nobel Prize?• Timing can be everything, even in rocket science.• She needed to be everything she could be and London would provide for that.• Well, that seems to be everything so far as tomorrow is concerned.• It meant everything to her to be able to play her senior year.• Beckwith meant everything to him, she'd recognized that from the first.• Walt's family means everything to him. 