phase

noun
\ ˈfāz \

Definition of phase

 (Entry 1 of 2)

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 career
b : 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
in phase
: in a synchronized or correlated manner
out of phase
: in an unsynchronized manner : not in correlation

phase

verb
phased; phasing

Definition of phase (Entry 2 of 2)

transitive verb

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

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Other Words from phase

Noun

phasic \ ˈfā-​zik \ adjective

Synonyms for phase

Synonyms: Noun

angle, aspect, facet, hand, side

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Examples of phase in a Sentence

Noun

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
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Recent Examples on the Web: Noun

Unfortunately, much of it, including the ability to control drone swarms and autonomously coordinate attacks, is still in the early phases and years from becoming a reality. Kyle Mizokami, Popular Mechanics, "The U.K. Promises to Develop Drone Swarms, But on an Unrealistic Timetable," 12 Feb. 2019 The 73-year-old defends her goddaughter's early phases of experimentation, even comparing Miley's provocative style to her own over-the-top appearance. Kelly O'sullivan, Country Living, "How Is Dolly Parton Related to Miley Cyrus?," 10 Feb. 2019 This is the final phase of reconstructing both of those corridors, bisected by railroad tracks that essentially cram four intersections into two. Bill Banks, ajc, "Decatur still waiting on state-of-the art traffic cabinets," 12 July 2018 Gray led the women’s 45-49 age group through all three phases of the sprint division race and won by a margin of 7 1/2 minutes. Bill Blewett, The Aegis, "Harford triathletes fare well at Diamond in the Rough," 12 July 2018 If the light emitted at the back of the bunch is not in phase with the light at the front, you get reduced output power. Chris Lee, Ars Technica, "Single-beam laser becomes multi-beam laser by kicking electrons," 5 Dec. 2018 Right now, the PlasticRoad is still in the testing phase to see how the material holds up over extended use. Liz Stinson, Curbed, "The Netherlands is testing a bike lane made from recycled plastic," 24 Sep. 2018 Halpern was the last lawyer to deliver closing arguments in the penalty phase of the marathon trial of Ingraham and his co-defendants, Andre Delancy and Bernard Forbes. Rafael Olmeda, Sun-Sentinel.com, "Final plea for mercy before jury weighs death penalty in murder of Broward deputy," 13 July 2018 Wisin now joins Luis Fonsi and Alejandra Guzman as coaches for the first season of the reality show, which is currently in the auditions phase. Suzette Fernandez, Billboard, "Wisin Takes the Third Coach Chair For Telemundo's 'La Voz' (The Voice)," 12 July 2018

Recent Examples on the Web: Verb

The increase, which will be phased in over ten years for men and 16 years for women, should significantly reduce the burden on the federal budget and allow for higher pensions to be paid. The Economist, "Russia will raise pension ages that date back to Stalin," 30 June 2018 The Center on Budget and Policy Priorities estimates those hikes could reach 44 percent on average, once the program was fully phased in over six years. Allie Gross, Detroit Free Press, "Ben Carson, in Detroit, draws questions on rent hikes for poor people," 7 June 2018 Among the obstacles is the question of whether the United States would be willing to make partial concessions on sanctions relief and other matters if North Korea asks for a phased-in approach to disarmament. Michael D. Shear, BostonGlobe.com, "US officials enter North Korea to lay groundwork for summit meeting," 27 May 2018 The task force had also recommended a per-ride surcharge of $2 to $5 on for-hire vehicles in a phased-in approach to congestion pricing. Winnie Hu, New York Times, "Congestion Pricing Falters in New York, Again," 31 Mar. 2018 Since December 2016, officials have deviated from quarterly increases just once, in September 2017, to phase in a reduction in their $4.5 trillion bond portfolio. Nick Timiraos, WSJ, "Fed Weighs Wait-and-See Approach on Future Rate Increases," 6 Dec. 2018 Once the castoffs were put in a donation bin, Marie got down to phase two: Organizing. Candace Braun Davison, House Beautiful, "Can Marie Kondo Conquer Caboodles?," 17 Aug. 2018 Current tenants will have rent increases phased in. Bill Leukhardt, Courant Community, "Waiting List Open For Southington Housing Authority Apartments," 13 July 2018 Besides working to grow the fleet of pilots, Cal Fire is phasing in new equipment to better prepare the agency to fight future blazes. Travis Fedschun, Fox News, "Pilot shortage grounds air tankers used to battle California wildfires from the sky," 6 Sep. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'phase.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of phase

Noun

1647, in the meaning defined at sense 1

Verb

1904, in the meaning defined at sense 1

History and Etymology for phase

Noun

New Latin phasis, from Greek, appearance of a star, phase of the moon, from phainein to show (middle voice, to appear) — more at fancy

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Statistics for phase

Last Updated

20 Feb 2019

Look-up Popularity

Time Traveler for phase

The first known use of phase was in 1647

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More Definitions for phase

phase

noun

English Language Learners Definition of phase

: 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

noun
\ ˈfāz \

Kids Definition of phase

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.

phase

noun
\ ˈfāz \

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

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More from Merriam-Webster on phase

Thesaurus: All synonyms and antonyms for phase

Spanish Central: Translation of phase

Nglish: Translation of phase for Spanish Speakers

Britannica English: Translation of phase for Arabic Speakers

Britannica.com: Encyclopedia article about phase

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