WordReference Random House Learner's Dictionary of American English © 2015
dis•ser•ta•tion /ˌdɪsɚˈteɪʃən/USA pronunciation   n. [countable]
    1. Educationa thesis, esp. one written by a candidate for a doctoral degree:wrote a dissertation on economic policy.
    1. any formal speech or writing:a dissertation on natural childbirth.

WordReference Random House Unabridged Dictionary of American English © 2015
dis•ser•ta•tion  (dis′ər tāshən), 
    1. Educationa written essay, treatise, or thesis, esp. one written by a candidate for the degree of Doctor of Philosophy.
    1. any formal discourse in speech or writing.
  • Latin dissertātiōn- (stem of dissertātiō), equivalent. to dissertāt(us) (past participle of dissertāre; dissert- (see dissert) + -ātus -ate1) + -iōn- -ion
  • 1605–15
dis′ser•tation•al, adj. 
dis′ser•tation•ist, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

dissertation /ˌdɪsəˈteɪʃən/ n
  1. a written thesis, often based on original research, usually required for a higher degree
  2. a formal discourse

ˌdisserˈtational adj

'dissertation' also found in these entries:
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