# Dictionary Definition

predictability n : the quality of being
predictable [ant: unpredictability]

# User Contributed Dictionary

#### Translations

The characteristic of being predictable

- Dutch: voorspelbaarheid
- Finnish: ennakoitavuus, ennustettavuus

# Extensive Definition

Predictability (also called banality) refers to
the degree that a correct forecast of a system's state can
be made either qualitatively or quantitatively. While the
second law of thermodynamics can tell us about the equilibrium
state that a system will evolve to, and steady
states in dissipative
systems can sometimes be predicted, there exists no general
rule to predict the time
evolution of systems far from equilibrium, etc. chaotic
systems, if they do not approach some kind of equilibrium.
Their predictability usually deteriorates with time. To quantify
predictability, the rate of divergence of system trajectories in phase space
can be measured (Kolmogorov-Sinai
entropy, Lyapunov
exponents).

# Synonyms, Antonyms and Related Words

authenticity, authoritativeness,
calculability,
dependability,
divinability,
faithworthiness,
firmness, foreknowableness,
foreseeability,
foretellableness,
frequency curve, frequency distribution, game theory, invincibility,
mathematical probability, operations research, probability theory,
probable error, quantum mechanics, reliability, secureness, security, solidity, soundness, stability, standard deviation,
statistical mechanics, statistical probability, statistics, staunchness, steadfastness, steadiness, substantiality, trustworthiness,
uncertainty principle, unerringness, validity