Abstraction: ideas or expressions that are not concrete or physical; the process of extracting general concepts from specific examples, or works that emphasize conceptual/formal qualities (e.g., abstract art).
抽象的な概念を初心者にわかりやすく説明するのは難しい。
It's difficult to explain abstract concepts clearly to beginners.
この美術展には抽象画が多く展示されている。
Many abstract paintings are exhibited at this art show.
抽象と具体を区別して考えることが重要だ。
It's important to distinguish between the abstract and the concrete.