Or if you like a more formal answer:

–verb (used with object) 1. to acquire knowledge of or skill in by study, instruction, or experience: to learn French; to learn to ski.

2. to become informed of or acquainted with; ascertain: to learn the truth.

3. to memorize: He learned the poem so he could recite it at the dinner.

4. to gain (a habit, mannerism, etc.) by experience, exposure to example, or the like; acquire: She learned patience from her father.

5. (of a device or machine, esp. a computer) to perform an analogue of human learning with artificial intelligence.

6. Nonstandard. to instruct in; teach.

–verb (used without object) 7. to acquire knowledge or skill: to learn rapidly.

8. to become informed (usually fol. by of): to learn of an accident.