The term "lower resolution" refers to a decrease in the quality or clarity of an image, video, or audio signal. This can be due to several factors such as reduced pixel count, decreased color depth, lower frame rate, and smaller file size. Lower resolution means that there are fewer pixels (or data points) representing the image, resulting in less detail and a grainier appearance. In other words, it is an indication of how much information is being used to represent the image or signal, with higher resolution indicating more detailed images and smoother playback.