Why don't the ruby docs say that send() can take a block?

Kernel.send(:define_method, :my_meth) do |x|
  puts x
end

my_meth(10)

--output:--
10

At the following link there is nothing saying that send() will accept a
block:

http://www.ruby-doc.org/core/classes/Object.html#M000999

Whereas, for example, at the following link it states that grep() will
take a block:

http://www.ruby-doc.org/core/classes/Enumerable.html#M001482

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