(おうよう)

おうよう
noun
application, practical use
electronics
1. application, practical use
The act of putting theoretical knowledge or principles into practical use.
I will apply this theory in practice.
Application problems are harder than basic ones.
The application of science changed society.

応用(おうよう) refers to putting theory or knowledge into practical use. Can function as a noun or する verb.

Usage as verb

応用(おうよう)する means to apply or put into practice.

Compounds

CONTRAST WITH 基礎(きそ):
基礎(きそ) (basics, foundation) vs 応用(おうよう) (application). This pair is common in education and training: 基礎(きそ)(へん)応用(おうよう)(へん).

Related: 実用(じつよう) (practical use) emphasizes everyday utility.