What is Undertaking ?

Undertaking is noun 1. a business The Post Office must be consid- ered as a commercial undertaking, not as a public service. 2. a promise She gave him an undertaking that she would continue to work for a further six months. They have given us a written undertaking that they will not play loud music after ten o’clock at night. 3. a large-scale job it was quite an under- taking it was a very difficult job


source: Easier English, Student Dictionary Upper Intermediate Level