verb (used with object), o·ver·learned [oh-ver-lurnd] or o·ver·learnt [oh-ver-lurnt,] o·ver·learn·ing. Education. to learn or memorize beyond the point of proficiency or immediate recall.

What do you mean by overlearning?

“Overlearning” is the process of rehearsing a skill even after you no longer improve. Even though you seem to have already learned the skill, you continue to practice at that same level of difficulty.

What does it mean to Overlearn the material you are studying?

To continue studying or practicing (something) after initial proficiency has been achieved so as to reinforce or ingrain the learned material or skill.