D defs.my
Entry 5 senses Webster, 1913

Thesis

/thēs'-əs/ · The·sis · IPA /ˈθisɪs/
01 n. A position or proposition which a person advances and offers to maintain, or which is actually maintained by argument.
pl. Theses ((#))
  1. 1.
    A position or proposition which a person advances and offers to maintain, or which is actually maintained by argument.
  2. 2.
    Hence, an essay or dissertation written upon specific or definite theme; especially, an essay presented by a candidate for a diploma or degree.
    “I told them of the grave, becoming, and sublime deportment they should assume upon this mystical occasion, and read them two homilies and a thesis of my own composing, to prepare them.” Goldsmith.
  3. 3.
    An affirmation, or distinction from a supposition or hypothesis.(Logic)
  4. 4.
    The accented part of the measure, expressed by the downward beat; -- the opposite of arsis.(Mus.)
  5. 5.
    The depression of the voice in pronouncing the syllables of a word.(Pros.)