Meaning of the word "first principles" in English

What does "first principles" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

first principles

US /fɜrst ˈprɪnsəpəlz/
UK /fɜːst ˈprɪnsəpəlz/

Phrase

a basic, fundamental proposition or assumption that cannot be deduced from any other proposition or assumption

Example:
To solve the complex problem, we need to go back to first principles.
Her approach to design is based on first principles, rather than imitating existing solutions.