Variable and Contrary

noun

• Something that is likely to vary; something that is subject to variation.
  • usage: "the weather is one variable to be considered"
• A quantity that can assume any of a set of values.
  • synonyms: variable quantity
• A star that varies noticeably in brightness.
  • synonyms: variable star
• A symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity.

adjective

• Liable to or capable of change.
  • usage: "rainfall in the tropics is notoriously variable"; "variable winds"; "variable expenses"
• Marked by diversity or difference.
  • usage: "the varying angles of roof slope"; "nature is infinitely variable"
  • synonyms: varying
• Used of a device) designed so that a property (as e. G. Light) can be varied. (
  • usage: "a variable capacitor"; "variable filters in front of the mercury xenon lights"

• (n.) Those parts of the sea where a steady wind is not expected, especially the parts between the trade-wind belts.
• (n.) That which is variable; that which varies or is subject to change.
• (a.) Liable to vary; too susceptible of change; mutable; fickle; unsteady; inconstant; as, the affections of men are variable; passions are variable.
• (n.) A quantity which may increase or decrease; a quantity which admits of an infinite number of values in the same expression; a variable quantity; as, in the equation x2 - y2 = R2, x and y are variables.
• (a.) Having the capacity of varying or changing; capable of alternation in any manner; changeable; as, variable winds or seasons; a variable quantity.
• (n.) A shifting wind or one that varies in force.

Variable is an element in a model. For example, in the model RS&Pt+1 = a + b Tbill t + et, where RS&Pt+1 is the return on the S&P in month t+1 and Tbill is the Tbill return at month t, both RS&P and Tbill are "variables" because they change through time; i. E., they are not constant.

noun

• A relation of direct opposition.
  • usage: "we thought Sue was older than Bill but just the reverse was true"
  • synonyms: reverse, opposite
• Exact opposition.
  • usage: "public opinion to the contrary he is not guilty"
• A logical relation such that two propositions are contraries if both cannot be true but both can be false.

adjective

• Very opposed in nature or character or purpose.
  • usage: "acts contrary to our code of ethics"; "the facts point to a contrary conclusion"
• Of words or propositions so related that both cannot be true but both may be false.
  • usage: "`hot' and `cold' are contrary terms"
• Resistant to guidance or discipline.
  • usage: "Mary Mary quite contrary"; "an obstinate child with a violent temper"; "a perverse mood"; "wayward behavior"
  • synonyms: obstinate, perverse, wayward
• In an opposing direction.
  • usage: "adverse currents"; "a contrary wind"
  • synonyms: adverse

• (n.) See Contraries.
• (a.) Opposed; contradictory; repugnant; inconsistent.
• (n.) the opposite; a proposition, fact or condition incompatible with another; as, slender proofs which rather show the contrary. See Converse, n., 1.
• (a.) Opposite; in an opposite direction; in opposition; adverse; as, contrary winds.
• (a.) Affirming the opposite; so opposed as to destroy each other; as, contrary propositions.
• (a.) Given to opposition; perverse; forward; wayward; as, a contrary disposition; a contrary child.
• (n.) A thing that is of contrary or opposite qualities.
• (n.) An opponent; an enemy.