A term used to refer to a situation in which the amplitude of a signal varies with time. A signal would be viewed in the time domain by using an oscilloscope. See alsospace domain.
Electronics and Electrical Engineering
A term used to refer to a situation in which an electrical signal is represented as a function of time, for example representing how a voltage varies with time. An oscilloscope displays signals in the time domain. See alsospectrum analyser.
Geology and Earth Sciences
A reference framework in which measurements are related to time, rather than to frequency. Comparefrequency domain.