What is Omnibus ?
Omnibus is (noun) 1. a book which includes several books all together An omnibus edition of Sherlock Holmes stories. 2. a radio or TV programme bringing several programmes together which were previously broadcast separately Don’t forget to listen to the omnibus edition on Saturday morning! 3. a bus or large vehicle which carries passengers (old.) Horse-drawn omnibuses started to run in London in 1829.
source: Easier English, Student Dictionary Upper Intermediate Level