fundamental; theoretical; in principle
Describes something based on fundamental principles or theory, often contrasting with practical or actual situations. Commonly used in phrases like 原理的には (in principle).
It's possible in principle, but difficult to realize.
This device adopts a fundamentally new method.
基本的 means 'basic' or 'fundamental' in a general sense, whereas 原理的 is more specifically about underlying principles or theory.
Derived from 原理 (principle) + 的 (adjectival suffix).