Literally meaning: “stage”
Origin: Anc Greek
φάσις/phasis(=stage) > φάσκω/phasko(=imperfect tense of verb “φημί”/phemi(=appear, show, manifest, aver)
1. (biology) Phase is defined as the stage in a process eg of development or cell cycle (anaphase, metaphase, telophase).
2. (physics) Phase is a region of space. In electronic signaling, phase is the position of a point in time on a waveform cycle.