All means ‘every one’, ‘the complete number or amount’ or ‘the whole’. We use it most often as a determiner. We can use a countable noun or an uncountable noun after it
There are 63 meanings listed in OED's entry for the word all, two of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.
You use all to refer to a situation or to life in general. All is silent on the island now. As you'll have read in our news pages, all has not been well of late.
May 13, 2025 · The overall five-year survival rate for ALL is 72%. That means that 72% of children and adults diagnosed with acute lymphoblastic leukemia will still be alive five
Who should I meet in New York but Max of all people! = Of all the people in New York, who should I run into but Max! [=I was very surprised to meet Max in New York]
'All' means the whole quantity or extent of something, or the greatest possible amount or degree of something. It can be used as a determiner, pronoun, or adverb, and is often used