- (chemistry) The amount of solute in a solution measured in suitable units (e.g., parts per million (ppm))
An example of concentration is the amount of salt to water in a saltwater solution.
An example of concentration is a student focusing all of her after school time on a specific research paper.
- The direction of attention to a specific object.
- The act or process of removing the dress of ore and of reducing the valuable part to smaller compass, as by currents of air or water.