thesis

noun
B2+
1
B2+
a long piece of writing completed by a student as part of a university degree, based on their own research
پایان‌نامه, رساله
2
C1+
a statement or an opinion that is discussed in a logical way and presented with evidence in order to prove that it is true
تز, پایان‌نامه
The basic thesis of the book is fairly simple.
These latest findings support the thesis that sexuality is determined by nature rather than choice.