If something could realistically happen, it's a possibility. So winning the lottery is a slight possibility, but becoming king of the world is not even a remote possibility.

In one sense, a possibility is an option: "One possibility is that the UFO is just a shooting star." It can also mean more of a potential: "This house might look like an abandoned shack, but it's got so much possibility!" All meanings of possibility share the sense that something is able to happen, or is possible. The Latin root is possibilis, "that can be done."

Definitions of possibility

n capability of existing or happening or being true

“there is a possibility that his sense of smell has been impaired”
impossibility, impossibleness
incapability of existing or occurring
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conceivability, conceivableness
the state of being conceivable
achievability, attainability, attainableness
the state of being achievable
potency, potential, potentiality
the inherent capacity for coming into being
chance, opportunity
a possibility due to a favorable combination of circumstances
the state of being not yet evident or active
chance, prospect
the possibility of future success
brass ring
a rich opportunity or a prize
a period of opportunity
clean slate, fresh start, tabula rasa
an opportunity to start over without prejudice
audience, hearing
an opportunity to state your case and be heard
hunting ground
a place where opportunities abound
an opportunity to do something
opportunity especially for employment or promotion
opportunity for
the chance to speak
crack, shot
a chance to do something
a situation offering opportunities
a single chance or instance
Type of:
being, beingness, existence
the state or fact of existing

n a future prospect or potential

“this room has great possibilities
Type of:
expectation, outlook, prospect
belief about (or mental picture of) the future

n a possible alternative

“bankruptcy is always a possibility
opening, possible action
something that can be done
Type of:
alternative, choice, option
one of a number of things from which only one can be chosen

n a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena

hypothesis, theory
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a hypothetical possibility, circumstance, statement, proposal, situation, etc.
the physically discrete element that Darwin proposed as responsible for heredity
framework, model, theoretical account
a hypothetical description of a complex entity or process
conjecture, speculation
a hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence)
assumption, supposal, supposition
a hypothesis that is taken for granted
a theory that social and cultural events are determined by history
computer simulation, simulation
(computer science) the technique of representing the real world by a computer program
an intuitive assumption
base, basis, cornerstone, foundation, fundament, groundwork
the fundamental assumptions from which something is begun or developed or calculated or explained
mean sun
a theoretical sun that moves along the celestial equator at a constant speed and completes its annual course in the same amount of time the real sun takes at variable speeds
Copernican system
(astronomy) Copernicus' astronomical model in which the Earth rotates around the sun
Ptolemaic system
(astronomy) Ptolemy's model of the universe with the Earth at the center
(particle physics) a theory that involves an eleven-dimensional universe in which the weak and strong forces and gravity are unified and to which all the string theories belong
string theory
(particle physics) a theory that postulates that subatomic particles are one-dimensional strings
given, precondition, presumption
an assumption that is taken for granted
basic assumption, constatation, self-evident truth
an assumption that is basic to an argument
stochastic process
a statistical process involving a number of random variables depending on a variable parameter (which is usually time)
Type of:
concept, conception, construct
an abstract or general idea inferred or derived from specific instances

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