In 1998, Robert Boostrom wrote that ‘safe-space’ was an emerging metaphor in educational discourse but was not yet a ‘topic of educational inquiry’ (p.398). Whilst there has been a great amount of work since then exploring the topic (for example, Holley and Steiner; Stengel; The Roestone Collective and Callan), a lack of clarity still clouds the debate around the place of safe spaces in the classroom. In this paper, I address this lack of clarity by addressing the fundamental question: (...) what does it mean for a classroom to be safe? I do so by considering the variety of meanings which have been ascribed to ’safety’ in educational contexts in light of the purpose for which the concept is used. I’ll defend a particular refinement of the concept – what I call an ’objective approach to safety’ - on the grounds that it most effectively captures the conditions we value, and can appropriately describe as safety, in the classroom. (shrink)