: 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, …

States of matter such as solid and liquid are examples of phases, as are different crystal lattice structures in metals such as iron. A measure of how far some cyclic behavior, such as wave …

Distinct phases may be described as different states of matter such as gas, liquid, solid, plasma or Bose–Einstein condensate. Useful mesophases between solid and liquid form other states of …

When I was in my early teens I went through a phase of only ever wearing black. The phases of the moon are the regular changes in its shape as it appears to us on earth.

A phase is a particular stage in a process or in the gradual development of something. The crisis is entering a crucial, critical phase. If an action or change is phased over a period of time, it is …

A phase is a particular period of time, like someone whose "teenage rebellion" phase lasts well into her thirties. The word phase can mean a stage in a person’s development or a step in a …

Oct 16, 2025 · From New Latin phasis, from Ancient Greek φάσις (phásis, “an appearance”), from φαίνω (phaínō, “to cause to appear”); compare phantasm and see face. phase (plural phases) …

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

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.