olemus
(a) matemaatikas:
pideva funktsiooni teisendamine diskreetseks
= converting a continuous function to a discrete one
https://www.cis.rit.edu/class/simg712-01/notes/13-Sampling.pdf

(b) signaalitöötluses:
pideva signaali muutmine diskreetseks
Wiktionary:
4. (signal processing) the measurement, at regular intervals, of the amplitude of a varying waveform in order to convert it to digital form
https://en.wikipedia.org/wiki/Sampling_(signal_processing)