Week by week Definition 1 of 2Pro Tip 1/3Gradual Change Indicates steady progression over each week, often related to things improving or developing. Her language skills are expanding week by week. Pro Tip 2/3Measurable Growth Used when you can see clear results or differences with each passing week. The company's revenue is increasing week by week. Pro Tip 3/3Consistency Highlights a consistent, perhaps disciplined, approach rather than occasional effort. He's been exercising week by week without fail.