: 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, oscillation, or …

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

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

Nov 5, 2025 · (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 disk. Illustrated in …

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.

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.

Phase definition: A distinct stage of development.

From Longman Business Dictionary phase1 /feɪz/ noun [countable] 1 a part of a process of development or growth The company is conducting phase 1 and phase 2 clinical trials with the drug.

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.

Phase transition This diagram shows the nomenclature for the different phase transitions. In physics, chemistry and biology, a phase transition (or phase change) is the physical process of transition …