Searching stock by only this one single word gave me some result over 230.000 images that’s a big search, of course can see only hundred first ones online, then have to set some another keyword to concrete my expectation.
In art abstract means that kind of plastically art that is devoid of any characteristics of illustrative and an artist is not imitate the nature. In that point lot of DT images that have abstract in keywords do not much to this theory. But abstract is sometimes defined only by the artist that wants to show something that is abstract to him self.
It is hard subject with some hard answers from the bottom of our hearts and minds.