Underpinning definition is – the material and construction (such as a foundation) used for support of a structure. How to use underpinning in a sentence.
Something that is academic is related to school. Your parents might want to spend less time playing video games and more time focusing on academic pursuits. The noun academic refers to a professor or scholar.
In everyday use, it may mean a hunch, or a guess. Scientists understand the term quite differently.
Theoretical definition is – existing only in theory : hypothetical. How to use theoretical in a sentence.