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three-phase

American

[three-feyz] / ˈθriˌfeɪz /

adjective

Electricity.

of or relating to a circuit, system, or device that is energized by three electromotive forces that differ in phase by one third of a cycle or 120°.
having three phases.

three-phase British

adjective

(of an electrical system, circuit, or device) having, generating, or using three alternating voltages of the same frequency, displaced in phase by 120°

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of three-phase

First recorded in 1890–95

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The three-phase, $30-billion-dollar plan for lunar dominance is relatively straightforward.

From Salon • Apr. 9, 2026

"We won 15 lower house seats out of 16 places in Yangon region," they added, after Kawhmu and dozens of other constituencies voted on Sunday in the second stage of a three-phase election.

From Barron's • Jan. 12, 2026

Using advanced microscopy, the researchers identified a three-phase sequence that coral fragments follow when attaching to the reef surface.

From Science Daily • Oct. 29, 2025

The three-phase polls will also extend to the 43 seats in the neighbouring Hindu-majority Jammu region.

From BBC • Sep. 16, 2024

Alternating current wiring is treated, with explanations of the power factor, conditions calling for various sizes of wire, and a simple way of obtaining the sizes for single-phase, two-phase and three-phase circuits.

From Aviation Engines Design?Construction?Operation and Repair by Pag?, Victor Wilfred

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023