How to use define_method inside initialize()

Trying to use define_method inside initialize but getting undefined_method define_method. What am I doing wrong? class C def initialize(n) define_method ("#{n}") { puts "some method #{n}" } end end C.new("abc") #=> NoMethodError: undefined method `define_method' for #<C:0x2efae80>

[youko03]

“If you use define_method on self.class, you'll create the new method as an instance method on the whole class so it will be available as a method on all instances of the class.”