1. Relating to geometry; using the principles or methods of geometry: The young architect used geometric techniques in her building project.
2. Referring to a design, using or resembling the simple linear figures or forms associated with geometry: Jane used geometric shapes, like circles or triangles, in her patchwork quilt for her bed.

The ratio (elation in degree or number between two similar things) of a solar collector aperture area (amount of light admitted) to the absorber area or the surface on a solar collector that absorbs solar radiation: Jeff learned thatt a geometric concentration ratio was the ration or relation between a section of the photosensitive part of a solar cell and the complete area of that cell.