: the point or stage in a period of uniform circular motion, harmonic motion, or the periodic changes of any magnitude varying according to a simple harmonic law to which the rotation, …

A phase is one of the forms in which matter can exist, such as solid, liquid, or a gas.

State of matter, or phase, one of the distinct forms in which matter can exist Phase (matter), a region of space throughout which all physical properties are essentially uniform

2 days ago · (astronomy) A particular appearance or state in a regularly recurring cycle of changes with respect to quantity of illumination or form, or the absence, of a body's illuminated …

a stage in a process of change or development: Each phase of life brings its own joys. a side, aspect, or point of view: This is only one phase of the question.

1. any distinct or characteristic period or stage in a sequence of events or chain of development: there were two phases to the resolution; his immaturity was a passing phase.

Phase definition: A distinct stage of development.

PHASE definition: any of the major appearances or aspects in which a thing of varying modes or conditions manifests itself to the eye or mind. See examples of phase used in a sentence.

Moon Phase for today: Dec 14, 2025 The Moon's current phase for today and tonight is a Waning Crescent phase. This phase is best viewed just before the sunrise in the western sky. In this …

This page explains phase difference in sine waves, detailing how they can be in phase (0 degrees) or out of phase (180 degrees). The amplitude of the resulting wave is affected by this …