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phase  (fz)
1. A distinct stage of development: The American occupation of Japan fell into three successive phases (Edwin O. Reischauer).
2. A temporary manner, attitude, or pattern of behavior: just a passing phase.
3. An aspect; a part: every phase of the operation.
4. Astronomy One of the cyclically recurring apparent forms of the moon or a planet.
5. Physics
a. A particular stage in a periodic process or phenomenon.
b. The fraction of a complete cycle elapsed as measured from a specified reference point and often expressed as an angle.
6. Chemistry
a. Any of the forms or states, solid, liquid, gas, or plasma, in which matter can exist, depending on temperature and pressure.
b. A discrete homogeneous part of a material system that is mechanically separable from the rest, as is ice from water.
7. Biology A characteristic form, appearance, or stage of development that occurs in a cycle or that distinguishes some individuals of a group: the white color phase of a weasel; the swarming phase of locusts.
tr.v. phased, phas·ing, phas·es
1. To plan or carry out systematically by phases.
2. To set or regulate so as to be synchronized.
Phrasal Verbs:
phase in
To introduce, one stage at a time.
phase out
To bring or come to an end, one stage at a time.
in phase
In a correlated or synchronized way.
out of phase
In an unsynchronized or uncorrelated way.

[Back-formation from New Latin phass, phases of the moon, from Greek phaseis, pl. of phasis, appearance, from phainein, to show; see bh-1 in Indo-European roots.]

phasic (fzk) adj.
Synonyms: phase, aspect, facet, angle2, side
These nouns refer to a particular or possible way of viewing something, such as an object or a process: Phase refers to a stage or period of change or development: A phase of my life was closing tonight, a new one opening tomorrow (Charlotte Brontë).
Aspect is the way something appears at a specific vantage point: considered all aspects of the project.
A facet is one of numerous aspects: studying the many facets of the intricate problem.
Angle suggests a limitation of perspective, frequently with emphasis on the observers own point of view: the reporters angle on the story.
Side refers to something having two or more parts or aspects: Much might be said on both sides (Joseph Addison).

phase [feɪz]
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
2. (Astronomy) Astronomy one of the recurring shapes of the portion of the moon or an inferior planet illuminated by the sun the new moon, first quarter, full moon, and last quarter are the four principal phases of the moon
3. (Physics / General Physics) Physics
a.  the fraction of a cycle of a periodic quantity that has been completed at a specific reference time, expressed as an angle
b.  (as modifier) a phase shift
4. (Physics / General Physics) Physics a particular stage in a periodic process or phenomenon
(Physics / General Physics)
in phase (of two waveforms) reaching corresponding phases at the same time
(Physics / General Physics)
out of phase (of two waveforms) not in phase
7. (Chemistry) Chem a distinct state of matter characterized by homogeneous composition and properties and the possession of a clearly defined boundary
8. (Life Sciences & Allied Applications / Zoology) Zoology a variation in the normal form of an animal, esp a colour variation, brought about by seasonal or geographical change
9. (Life Sciences & Allied Applications / Biology) Biology (usually in combination) a stage in mitosis or meiosis prophase metaphase
10. (Engineering / Electrical Engineering) Electrical engineering one of the circuits in a system in which there are two or more alternating voltages displaced by equal amounts in phase (sense 5) See also polyphase [1]
11. (Linguistics / Grammar) (in systemic grammar) the type of correspondence that exists between the predicators in a clause that has two or more predicators; for example connection by to, as in I managed to do it, or -ing, as in we heard him singing
vb (tr)
1. (often passive) to execute, arrange, or introduce gradually or in stages a phased withdrawal
2. (sometimes foll by with) to cause (a part, process, etc.) to function or coincide with (another part, process, etc.) he tried to phase the intake and output of the machine he phased the intake with the output
3. (Business / Commerce) Chiefly US to arrange (processes, goods, etc.) to be supplied or executed when required
[from New Latin phases, pl of phasis, from Greek: aspect; related to Greek phainein to show]
phaseless  adj
phasic , phaseal adj

phase  (fz)
1. Any of the forms, recurring in cycles, in which the Moon or a planet appears in the sky.
2. One of a set of possible homogenous, discrete states of a physical system. States of matter such as solid and liquid are examples of phases, as are different crystal lattice structures in metals such as iron. See also phase transitionstate of matter
3. A measure of how far some cyclic behavior, such as wave motion, has proceeded through its cycle, measured in degrees or radians. At the beginning of the phase, its value is zero; at one quarter of its cycle, its phase is 90 degrees (/2 radians); halfway through the cycle its value is 180 degrees ( radians), and so on. The phase angle between two waves is a measure of their difference in phase. Two waves of the same frequency that are perfectly in phase have phase angle zero; if one wave is ahead of the other by a quarter cycle, its phase angle 90 degrees (/2 radians); waves that are perfectly out of phase have phase angle 180 degrees ( radians), and so on. See more at wave.

phase  /fez/  n. 1 a period of time within a longer process of change, a stage of development: The time you spend in high school is an important phase of your education. 2 a stage in the regularly changing appearance of the moon: We studied the phases of the moon in school. 3 to go through a phase: to behave in an unusual way for a brief time while growing up: She is going through a phase in which she is always impatient.
v. [T] phased, phasing, phases 1 to plan to do s.t. in phases: They phased the project in three sections. 2 phrasal v. sep. to phase s.t. in or out: to introduce or remove s.t. in gradual steps: They are phasing out that old model of TV.||They are phasing it out. phase

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