every thing or particular of an aggregate or total; all.

something extremely important

This news means everything to us.

something that is extremely or most important

Money is his everything.

noun

nothing

noun

aggregate , all , all in all , all that , all things , business , complex , each thing , every little thing , fixins’ , lock stock and barrel , lot , many things , sum , the works , total , universe , whole , whole ball of wax , whole caboodle * , whole enchilada , whole lot , whole shebang , entirety , gross , totality