noun, na-adjective
ideal; perfect model
General use as a noun or na-adjective for an ideal standard or perfect example. Often used in philosophical, artistic, or everyday contexts.
彼は理想のイデアルを追い求めている。
He pursues his ideal of perfection.
このデザインはとてもイデアルだ。
This design is very ideal.
noun
Technical term in ring theory. A subset of a ring closed under addition and multiplication by ring elements.
整数環のイデアルについて学んだ。
I learned about ideals in the ring of integers.