Meaning: existing in thought or as an idea but not having a physical or concrete existence.
* The concept of justice is abstract, but it guides our legal system.
* She wrote an abstract painting, filled with swirling colors and shapes.
* The philosopher discussed the abstract nature of time and space.
Meaning: considering something theoretically or generally.
* We need to think abstractly about the problem and find a solution that applies to all situations.
* The abstract principles of the constitution can be applied to specific cases.
* His lectures were often abstract, focusing on theoretical concepts rather than practical details.
Meaning: a summary of a longer piece of writing, such as an academic article or research paper.
* The abstract of the paper explained the main findings and conclusions.
* I read the abstract to get a quick understanding of the research before reading the full article.
* You should always include an abstract when submitting your research for publication.
Meaning: not representing or relating to any specific instance; general.
* The artist used abstract shapes in their work, rather than depicting recognizable objects.
* The abstract concept of freedom is often debated in political discourse.
* He gave an abstract presentation, focusing on the general principles of the project.
Note: "Abstract" can also be used as a noun, meaning a summary or a work of art that does not depict recognizable objects.
Let me know if you'd like more examples or want to explore a specific meaning further!