someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs
"The young learner sat quietly at the front of the classroom, eagerly taking notes as the teacher explained the new concepts."
works for an expert to learn a trade
"The new apprentice worked as a learner under the master carpenter to study the craft of furniture making."
One who is learning.
"The eager learner quickly absorbed new vocabulary during the language workshop."
The word learner is formed by adding the suffix -er to the verb learn. This construction follows a common pattern where an agent noun describes someone who performs the action of learning.