What does "thesis" mean?

Thesis: 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.

Additional senses

  1. 2.(Logic) An affirmation, or distinction from a supposition or hypothesis.
  2. 3.(Mus.) The accented part of the measure, expressed by the downward beat; -- the opposite of arsis.
  3. 4.(Pros.) (a) The depression of the voice in pronouncing the syllables of a word. (b) The part of the foot upon which such a depression falls.

Sources