This chapter presents commonly used terms in the study of postcolonialism. The terms listed begin with the alphabet “T”. Detailed explanation is provided for several terms, including terra incognito, terra nullius, testimonio, Text, third world and torrid zones. Each entry includes the origin of the term; a detailed explanation of its perceived meaning; and examples of the term's use in literary‐cultural texts. Terra nullius comes from the Papal Bull Terra Nullius issued by Pope Urban II, at the beginning of the Crusades. Testimonios have emerged from South Africa's apartheid era, the Partition of the Indian subcontinent, the Holocaust ‐ which remains one of the key ‘contributors’ to the genre ‐ genocidal regimes and cultures of Bosnia, Rwanda, and other places. Likewise Homi Bhabha's critique of the text stems from a deep distrust of the tradition of Western writing where the text is deemed to mimetically represent, or reflect, the real.