Yes, you can use a monitor as a TV. In fact, many people do this every day. Monitors are made to be used as TVs and they work just fine for this purpose. There are some things to keep in mind when using a monitor as a TV, however.
First of all, you will need an adapter to connect the monitor to your TV antenna or cable box. This is because monitors typically have HDMI ports while TVs have coaxial cables or other types of inputs. You can find adapters that fit your needs fairly easily and they are not very expensive.
Another thing to consider is the size of the monitor. If you plan on using it as your primary television, you will want one that is at least 27 inches diagonally measured from corner to corner. Anything smaller than this may not be suitable for watching most shows and movies.
Finally, make sure that the resolution of your monitor is high enough for your needs. Most newer monitors have resolutions of 1920×1080 or higher, which is more than adequate for most people’s needs. However, if you plan on using an older monitor with a lower resolution, it may not be ideal for watching HD content.