noun
thesis
THEE-sis/ˈθiːsɪs/
A claim developed through supporting argument.
The presenter supports the thesis that tree roots stabilize soil with a visual comparison.

Etymology
Greek thesis meant a “setting down” as well as a proposition. The underlying image is an idea set before others as a claim to be proved or debated.
In context
Rand developed an original thesis in ethics that values arise from the fact that living organisms must initiate their own actions to maintain their own Survival
More examples
- State your thesis clearly in the opening paragraph.
- The survey results support his thesis about flexible work schedules.
- The two writers defend opposing theses about the causes of poverty.
Forms
thesis · theses
Similar words
- claim
- Can be a simple assertion without a developed supporting argument.
- proposition
- Emphasizes an idea offered for consideration rather than sustained argument.