• A distinguishable part of a sequence or cycle occurring over time.
  • That which is exhibited to the eye; the appearance which anything manifests, especially any one among different and varying appearances of the same object.
  • Any appearance or aspect of an object of mental apprehension or view.
  • 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. Illustrated in Wikipedia's article Lunar phase.
  • 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.
  • A component in a material system that is distinguished by chemical composition and/or physical state (solid, liquid or gas) and/or crystal structure. It is delineated from an adjoining phase by an abrupt change in one or more of those conditions.
  • In certain organisms, one of two or more colour variations characteristic of the species, but independent of the ordinary seasonal and sexual differences, and often also of age.
  • The period of play between consecutive breakdowns.
  • A haplotype.
  • The arctangent of the quotient formed by dividing the imaginary part of a complex number by the real part.
  • A distortion caused by a difference in the speed of propagation for different frequencies
  • In a polyphase electrical power system, one of the power-carrying conductors, or the alternating current carried by it.


  • To begin—if construed with "in"—or to discontinue—if construed with out—(doing) something over a period of time (i.e. in phases).
  • To determine haplotypes in (data) when genotypes are known.
  • To pass into or through a solid object.

Proper Noun


Narrower meaning words


  • From New Latin phasis, from Ancient Greek φάσις, from φάειν; compare phantasm and see face.
  • From Latin phase, Phasa, from Hebrew פָּסַח.

Modern English dictionary

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