progression

Short definition from Wiktionary

Noun

1. 1
   The act of moving from one thing to another.
2. 2
   The act of moving forward or proceeding in a course; motion onward.
3. 3
   A sequence obtained by adding or multiplying each term by a constant.
4. 4
   Development, increase, evolution.
5. 5
   A chord progression.
6. 6
   The process of making an exercise more strenuous by manipulating the details of its performance like loaded weight, range of motion, angle, speed.