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Simply put, meta-writing is writing that is self-conscious, self-reflective, and aware of itself as an artifice. The writer is aware she's writing, and she's aware there's a reader, which goes all the way back to Montaigne's often-used address "dear reader," or his brief introduction to Essais: "To the Reader." It can be done in a myriad of ways.

Source: www.guernicamag.com
Simply put, meta-writing is writing that is self-conscious, self-reflective, and aware of itself as an artifice. The writer is aware she's writing, and she's aware there's a reader, which goes all the way back to