AskDefine | Define phase

Dictionary Definition



1 (physical chemistry) a distinct state of matter in a system; matter that is identical in chemical composition and physical state and separated from other material by the phase boundary; "the reaction occurs in the liquid phase of the system" [syn: form]
2 any distinct time period in a sequence of events; "we are in a transitional stage in which many former ideas must be revised or rejected" [syn: stage]
3 a particular point in the time of a cycle; measured from some arbitrary zero and expressed as an angle [syn: phase angle]
4 (astronomy) the particular appearance of a body's state of illumination (especially one of the recurring shapes of the part of Earth's moon that is illuminated by the sun); "the full phase of the moon"


1 arrange in phases or stages; "phase a withdrawal"
2 adjust so as to be in a synchronized condition; "he phased the intake with the output of the machine"

User Contributed Dictionary




From phasis.


  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
    The problem has many phases.
  3. A particular appearance or state in a regularly recurring cycle of changes with respect to quantity of illumination or form, or the absence, of its enlightened disk; as, the phases of the moon or planets. Illustrated in Wikipedia's article Lunar phase.
  4. 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.



  1. (to phase out) To discontinue (doing) something over a period of time (i.e., in phases).
  2. To stun or shock someone.
  3. To become stunned or shocked.

Usage notes

The sense of phase meaning stunned or shocked is a misspelling of the intended word faze. This has become fairly common nonstandard use. See notes at faze.

Derived terms




fr-noun f

Extensive Definition

A phase is one point or portion in a recurring series of changes. Phase or phases may also refer to:

In science and engineering

In fiction


  • Phase (syntax), a syntactic domain hypothesized by Noam Chomsky
  • Phase 10, a card game created by Fundex Games
  • Phase (game), a music game for the iPod developed by Harmonix Music Systems
phase in Catalan: Fase
phase in Czech: Fáze
phase in Danish: Fase
phase in German: Phase
phase in Spanish: Fase
phase in French: Phase
phase in Galician: Fase
phase in Indonesian: Fase
phase in Italian: Fase
phase in Latvian: Fāze
phase in Dutch: Fase
phase in Japanese: フェーズ
phase in Norwegian: Fase
phase in Low German: Phaas
phase in Polish: Faza
phase in Portuguese: Fase (desambiguação)
phase in Russian: Фаза
phase in Slovak: Fáza
phase in Slovenian: Faza
phase in Serbian: Фаза
phase in Sundanese: Fase
phase in Swedish: Fas
phase in Vietnamese: Pha (định hướng)
phase in Ukrainian: Фаза
phase in Chinese: 態

Synonyms, Antonyms and Related Words

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