The "Time Domain" refers to the analysis of signals or functions with respect to time. In this context, signals can represent various phenomena, such as sound, light, or electrical currents. By examining how these signals change over time, we can understand their behavior and characteristics, which is essential in fields like signal processing and communications. In the time domain, data is typically represented as a waveform, showing amplitude variations at different time intervals. This approach contrasts with the frequency domain, where signals are analyzed based on their frequency components. Understanding both domains is crucial for applications in engineering and physics.