Definition of Dissertation

a long essay on a particular subject, especially one written as a requirement for the Doctor of Philosophy degree

Examples of Dissertation in a sentence

While pursuing his doctoral degree, the Ph.D. candidate elected to write his final thesis on the impact that depression during pregnancy can have on fetal development.  

Although he thought that his dissertation was solidly written, the graduate student was asked to write the thesis on a different topic.  

Using study results on the behavior of abandoned infants into adulthood, the doctoral student’s dissertation defended the theory that abandonment can breed mental illness.  

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