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dissertation (noun) a long essay on a subject of study.
A serious study, in the form of a long essay on a subject, submitted to a university, for the award of a degree, is a dissertation. A dissertation is a must in most of the universities in the US for the award of a master's degree.
- The dissertation he had submitted for his graduate program has been found to be of a high standard and has been accepted for publication in a research journal.
- The professor was disappointed at the low standards of the dissertations of most of the students. He found very few of these deserving any serious attention.