: 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 …

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

PHASE meaning: 1 : a part or step in a process one part in a series of related events or actions; 2 : a short period of time during which a person behaves in a particular way or likes a particular thing

Feb 19, 2026 · (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 …

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 /feɪz/ n., v., phased, phas•ing. n. [countable] a stage in a process of change or development: Her temper tantrums are just part of the phase she's going through. Astronomy the particular, usually …

Phase definition: A distinct stage of development.

Phase generally refers to a distinct stage or period in a process of change or development. It can be used in various fields such as physics, where it signifies the position of a point in time or space on a …

Definition of phase noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

A phase is a particular stage in a process or in the gradual development of something.