noun🔗ShareA formal exposition of a subject, especially a research paper that students write in order to complete the requirements for a doctoral degree; a thesis."Maria spent two years researching and writing her dissertation on the effects of climate change on local bird populations. "educationwritingachievementliteraturescienceChat with AIVocabulary GamePractice Reading
noun🔗ShareA lengthy lecture on a subject; a treatise; a discourse; a sermon."The professor launched into a lengthy dissertation on the history of economics during the lecture, leaving many students confused. "educationwritingliteratureChat with AIVocabulary GamePractice Reading
