Bandlimited is a term used in signal processing to describe a signal that has a limited range of frequencies. Interestingly, there are many different terms that can be used as a synonym for this term. Some of these synonyms include narrowband, restricted bandwidth, limited spectrum, low-pass filtered, or discreet frequency. No matter which term you choose, they all refer to the same basic concept of a signal that has had its frequencies constrained or limited in some way. It is important to understand these synonyms and how they relate to the concept of bandlimited signals, as they are essential to work with any signal processing applications.