Stagnant Level is a term used to describe a situation in which there is no change or progress. It is often used to describe a period of time in which there is no growth or development. The term can also be used to describe a situation in which a certain level of performance or achievement has been reached and is not likely to improve. The crossword solution for this term is PLATEAU, which is defined as a period of relative stability or a level that is not likely to change.