all is on the Basic English 850 List.
air - all - almost
all is one of the 1000 most common headwords.
air - all - allow

Pronunciation change

Determiner change

Determiner
all

  1. (definite) All of something is 100% of it, or the entire amount.
    Well, you could stay in bed all day on Friday. And I could take the kids to school.
    You know, you can't see all of the moon.
    "There was a problem." "Yes, I know all about it."
    No! You did it all wrong.
    Can you tell me all this tomorrow?
    I think we all know we have to change.
    The shirt is almost all white.
    Is that all you can do?
  2. All of some things is 100% of them, or every one.
    And then you can go and tell all your friends about it.
    Not all of them are as wealthy as you imagine.

Noun change

Singular
all

Plural
none

  1. (uncountable) If you give your all or put your all into something, you make the maximum effort possible.
    He puts his all into every game.