Open Educational Resources (OER) definitions are many and are under constant debate and evolution. The most recent international definition states that:
“teaching, learning and research materials in any medium, digital or otherwise, that reside in the public domain or have been released under an open license that permits no-cost access, use, adaptation and redistribution by others with no or limited restrictions. Open licensing is built within the existing framework of intellectual property rights as defined by relevant international conventions and respects the authorship of the work (Paris OER Declaration, 2012).
We also refer to the Open Educational Resource (OER) definition in a document written by UNESCO/Commonwealth of Learning:
“materials offered freely and openly for educators, students and self-learners to use and re-use for teaching, learning and research.” (2011)