I.
: something that represents all things regarded as having value, significance, or importance : everything
the craft that was all in all to her — Rudyard Kipling
II. adverb
1. : as a whole : altogether
all in all, each article undergoes 20 inspections before leaving the plant
take it all in all, this has been a hard week
2. : on the whole : all things considered : generally speaking
all in all, the chautauqua was a tremendous force in American life — Russell Potter
all in all, it might have been worse