Definition of phase
1 : a particular appearance or state in a regularly recurring cycle of changes phases of the moon
2a : a distinguishable part in a course, development, or cycle the early phases of her careerb : an aspect or part (as of a problem) under consideration
3 : 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 variation has advanced from its standard position or assumed instant of starting
4 : a homogeneous, physically distinct, and mechanically separable portion of matter present in a nonhomogeneous physicochemical system
5 : an individual or subgroup distinguishably different in appearance or behavior from the norm of the group to which it belongs; also : the distinguishing peculiarity
phasicplay \ˈfā-zik\ adjective
: in a synchronized or correlated manner
out of phase
: in an unsynchronized manner : not in correlation
Examples of phase in a sentence
The project will be done in three phases.
He's in the final phase of treatment now.
The building project marks a new phase in the town's development.
He has been throwing tantrums a lot, but the doctor says it's just a phase.
a calendar based on the phases of the moon
Origin and Etymology of phase
New Latin phasis, from Greek, appearance of a star, phase of the moon, from phainein to show (middle voice, to appear) — more at fancy
First Known Use: 1647
Definition of phase
1 : to adjust so as to be in a synchronized condition
2 : to conduct or carry out by planned phases
3 : to introduce in stages —usually used with in phase in new models
First Known Use of phase
PHASE Defined for English Language Learners
Definition of phase for English Language Learners
: a part or step in a process : one part in a series of related events or actions
: a short period of time during which a person behaves in a particular way or likes a particular thing
: the shape of the part of the moon that is visible at different times during a month
PHASE Defined for Kids
Definition of phase for Students
1 : a step or part in a series of events or actions : stage I have completed the first phase of my training.
2 : the way that the moon or a planet looks to the eye at any time in its series of changes with respect to how it shines The new moon and the full moon are two phases of the moon.
Medical Definition of phase
1: a particular appearance or state in a regularly recurring cycle of changes
2: a distinguishable part in a course, development, or cycle the early phases of a disease
3: a point or stage in the period of a periodic motion or process (as a light wave or a vibration) in relation to an arbitrary reference or starting point in the period
4: a homogeneous, physically distinct, and mechanically separable portion of matter present in a nonhomogeneous physicochemical system; especially : one of the fundamental states of matter usually considered to include the solid, liquid, and gaseous forms
5: an individual or subgroup distinguishably different in appearance or behavior from the norm of the group to which it belongs; also : the distinguishing peculiarity
Seen and Heard
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