Category:Phase

Phase, n.; pl. Phases. Etym: [nl. phasis, gr. phase. See phenomenon, Phantom, and emphasis.]

1. That which is exhibited to the eye; the appearance which anything Manifests, especially any one among different and varying appearances Of the same object.

2. Any appearance or aspect of an object of mental apprehension or View; as, the problem has many phases.

3. (astron.)

Defn: a particular appearance or state in a regularly recurring cycle Of changes with respect to quantity of illumination or form of Enlightened disk; as, the phases of the moon or planets. See illust. Under moon.

4. (physics)

Defn: any one point or portion in a recurring series of changes, as In the changes of motion of one of the particles constituting a wave Or vibration; one portion of a series of such changes, in distinction From a contrasted portion, as the portion on one side of a position Of equilibrium, in contrast with that on the opposite side.