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Message: [QUOTE="matt neuburg, post: 4634068"] Actually, I have to keep the architecture I've got - greeter is going to be called without a parameter, that's just how it is. (The problem as I posed it is just a schematic reduction of a vast existing architecture that does something else entirely.) However, your solution shows me exactly the trick I was missing: I need to turn @howdy into a local so that a block can see it: class ClassMaker def initialize(s); @howdy = s; end def greeter greeting = @howdy # the magic step! Class.new do define_method :hello do puts greeting end end.new end end ClassMaker.new("gday").greeter.hello Thanks! It's nice to stop banging myself over the head with a hammer... :) m. [/QUOTE]