thought of apart from concrete realities, specific objects, or actual instances: an abstract idea.

expressing a quality or characteristic apart from any specific object or instance, as justice, poverty, and speed.

theoretical; not applied or practical: abstract science.

difficult to understand; abstruse: abstract speculations.

Fine Arts. of or pertaining to the formal aspect of art, emphasizing lines, colors, generalized or geometrical forms, etc., especially with reference to their relationship to one another. (often initial capital letter) pertaining to the nonrepresentational art styles of the 20th century.