How to show zsh function definition (like bash "type myfunc")?

How do I show the definition of a function in zsh? type foo doesn't give the definition.

In bash:

bash$ function foo() { echo hello; }

bash$ foo
hello

bash$ type foo
foo is a function
foo () 
{ 
    echo hello
}

In zsh:

zsh$ function foo() { echo hello; }

zsh$ foo
hello

zsh$ type foo
foo is a shell function