nonthesis adjective 1noun 1forms 1 adjective1 •Not being or relating to a thesis. noun1 •Something that is posited in order to be disproved....or theses, and non-derivable propositions, non-theses, while also assigning an operator to relate the two, since the negation of a non-thesis should give us a derivable thesis. — 2021 formsnontheses