1) An idea, feeling or concept that is general or quite natural.
Love and beauty are abstract concepts.
2) Things that are mentioned in a general sense and not backed up with certain facts and figures.
Your argument is quite abstract, do you have any hard facts?
3)A type of art that tries to represent real or imaginative quality of objects using shapes, lines and colors without giving the exact shape of the object.
An abstract painter
4)A shortened form of the speech or an article.
The online sites only give the abstracts of the journal papers