Reprise means "repeat an earlier role." If you’re asked to reprise your role as "kid entertainer" at the annual family reunion, that means people want you to do it again this year.
Early on, reprise was a part in a song or other musical composition that is repeated. The word still carries that meaning, but now it's more likely to be used as a verb to describe an action or part that is repeated, often a performance. For example, if you played a role in a wildly successful film that is going to have a sequel, you would reprise your role. The word comes from the French word repris, meaning "take back."