1 : the entire range of skills or aptitudes or devices used in a particular field or occupation
2 : a collection of works (plays, songs, operas, ballets) that an artist or company can perform and do perform for short intervals on a regular schedule
3 : (computer science) a listing of the files stored in memory (usually on a hard disk)
4 : an alphabetical list of names and addresses
5 : covering that is folded over to protect the contents