constant

1. A quantity that does not vary (synset 105867520)
   is a type of: quantity - the concept that something has a magnitude and can be represented in mathematical expressions by a constant or a variable
   subtypes: parameter, parametric quantity - a constant in the equation of a curve that can be varied to yield a family of similar curves
   same as: constant quantity, invariable
2. A number representing a quantity assumed to have a fixed value in a specified mathematical context (synset 113606632)
   "the velocity of light is a constant"
   is a type of: number - a concept of quantity involving zero and units
   subtypes:

   • avogadro number, avogadro's number - the number of molecules in a mole of a substance (approximately 602,250,000,000,000,000,000,000)
   • boltzmann's constant - constant used in the calculation of the ideal gas constant
   • coefficient - a constant number that serves as a measure of some property or characteristic
   • cosmological constant - an arbitrary constant in the equations of general relativity theory
   • equilibrium constant - (chemistry) the ratio of concentrations when equilibrium is reached in a reversible reaction (when the rate of the forward reaction equals the rate of the reverse reaction)
   • gas constant, r, universal gas constant - (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
   • constant of gravitation, g, gravitational constant, universal gravitational constant - (physics) the universal constant relating force to mass and distance in Newton's law of gravitation
   • hubble constant, hubble parameter, hubble's constant, hubble's parameter - (cosmology) the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer; the Hubble constant is not actually a constant, but is regarded as measuring the expansion rate today
   • ionic charge - the charge on an ion is equal to a constant charge e multiplied by an integer from 1 to 15
   • constant of proportionality, factor of proportionality - the constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the factor of proportionality
   • c, light speed, speed of light - the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second

1. Unvarying in nature (synset 302516074)
   "maintained a constant temperature"; "principles of unvarying validity"
   similar to: invariable - not liable to or capable of change
   same as: changeless, invariant, unvarying
2. Steadfast in purpose or devotion or affection (synset 300585590)
   "a man constant in adherence to his ideals"; "a constant lover"; "constant as the northern star"
   also:

   • unchangeable - not changeable or subject to change
   • faithful - steadfast in affection or allegiance
   • stable - resistant to change of position or condition
   • invariable - not liable to or capable of change
   tells us about: constancy, stability - the quality of being enduring and free from change or variation
   similar to:

   • immutable - constant and unchanging
   • staunch, steadfast, unswerving - firm and dependable especially in loyalty
   • unfailing, unflagging - unceasing
3. Uninterrupted in time and indefinitely long continuing (synset 300597981)
   "the ceaseless thunder of surf"; "in constant pain"; "night and day we live with the incessant noise of the city"; "the never-ending search for happiness"; "the perpetual struggle to maintain standards in a democracy"; "man's unceasing warfare with drought and isolation"; "unremitting demands of hunger"
   similar to: continuous, uninterrupted - continuing in time or space without interruption
   same as: ceaseless, incessant, never-ending, perpetual, unceasing, unremitting

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