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."Students spend years researching and writing their dissertations to earn their Ph.D. degrees. "educationwritingachievementdegreeliteratureChat with AIVocabulary GamePractice Reading
noun🔗ShareA lengthy lecture on a subject; a treatise; a discourse; a sermon."Professor Davis's dissertation on the history of the family was a lengthy discourse, taking several hours to present. "educationliteraturewritinglanguageChat with AIVocabulary GamePractice Reading
