Let the music paint a picture for you, or let it remind you of a place you've been. Or a person you know, or a feeling you've had. Be as creative as you can be.
When we're playing, we're not thinking, we're creating and reacting as instinctually as possible. But afterwards, the music becomes something more familiar, something we know or we can relate to. For me, an atmosphere is being created, a three dimensional space in sound. The landscape is as abstract as the music suggests, with swirling colors, varying textures, and myriad depths. With hindsight and repeat listening, the music might make more concrete suggestions. But for now, relax, let go, and let it become something for you.