Dictionary.net

decide by reasoning; draw or come to a conclusion; "We reasoned that it was cheaper to rent than to buy a house"

a rational motive for a belief or action; "the reason that war was declared"; "the grounds for their declaration"

a fact that logically justifies some premise or conclusion; "there is reason to believe he is lying"

an explanation of the cause of some phenomenon; "the reason a steady state was never reached was that the back pressure built up too slowly"

think logically; "The children must learn to reason"

decide by reasoning; draw or come to a conclusion; "We reasoned that it was cheaper to rent than to buy a house"

a rational motive for a belief or action; "the reason that war was declared"; "the grounds for their declaration"

a fact that logically justifies some premise or conclusion; "there is reason to believe he is lying"

an explanation of the cause of some phenomenon; "the reason a steady state was never reached was that the back pressure built up too slowly"

think logically; "The children must learn to reason"

A thought or a consideration offered in support of a determination or an opinion; a just ground for a conclusion or an action; that which is offered or accepted as an explanation; the efficient cause of an occurrence or a phenomenon; a motive for an action or a determination; proof, more or less decisive, for an opinion or a conclusion; principle; efficient cause; final cause; ground of argument.

The faculty or capacity of the human mind by which it is distinguished from the intelligence of the inferior animals; the higher as distinguished from the lower cognitive faculties, sense, imagination, and memory, and in contrast to the feelings and desires. Reason comprises conception, judgment, reasoning, and the intuitional faculty. Specifically, it is the intuitional faculty, or the faculty of first truths, as distinguished from the understanding, which is called the discursive or ratiocinative faculty.

Ratio; proportion.

To exercise the rational faculty; to deduce inferences from premises; to perform the process of deduction or of induction; to ratiocinate; to reach conclusions by a systematic comparison of facts.

Hence: To carry on a process of deduction or of induction, in order to convince or to confute; to formulate and set forth propositions and the inferences from them; to argue.

To converse; to compare opinions.

To arrange and present the reasons for or against; to examine or discuss by arguments; to debate or discuss; as, I reasoned the matter with my friend.

To support with reasons, as a request.

To overcome or conquer by adducing reasons; - with down; as, to reason down a passion.

To find by logical processes; to explain or justify by reason or argument; - usually with out; as, to reason out the causes of the librations of the moon.

A thought or a consideration offered in support of a determination or an opinion; a just ground for a conclusion or an action; that which is offered or accepted as an explanation; the efficient cause of an occurrence or a phenomenon; a motive for an action or a determination; proof, more or less decisive, for an opinion or a conclusion; principle; efficient cause; final cause; ground of argument.

The faculty or capacity of the human mind by which it is distinguished from the intelligence of the inferior animals; the higher as distinguished from the lower cognitive faculties, sense, imagination, and memory, and in contrast to the feelings and desires. Reason comprises conception, judgment, reasoning, and the intuitional faculty. Specifically, it is the intuitional faculty, or the faculty of first truths, as distinguished from the understanding, which is called the discursive or ratiocinative faculty.

Ratio; proportion.

To exercise the rational faculty; to deduce inferences from premises; to perform the process of deduction or of induction; to ratiocinate; to reach conclusions by a systematic comparison of facts.

Hence: To carry on a process of deduction or of induction, in order to convince or to confute; to formulate and set forth propositions and the inferences from them; to argue.

To converse; to compare opinions.

To arrange and present the reasons for or against; to examine or discuss by arguments; to debate or discuss; as, I reasoned the matter with my friend.

To support with reasons, as a request.

To overcome or conquer by adducing reasons; - with down; as, to reason down a passion.

To find by logical processes; to explain or justify by reason or argument; - usually with out; as, to reason out the causes of the librations of the moon.

The ability to form conclusions and know right from wrong; right judgment; intellect or thinking power; sanity or sane opinions; cause for opinion or act.

To exercise the power of thinking logically or drawing conclusions; to argue.

To persuade by argument; to prove or explain by means of the intellect; as, to reason out a solution.

That which supports or justifies an act, etc.: a motive: proof: excuse: cause: the faculty of the mind by which man draws conclusions, and determines right and truth: the exercise of reason: just view of things: right conduct: propriety: justice.

To exercise the faculty of reason: to deduce inferences from premises: to argue: to debate: (B.) to converse.

To examine or discuss: to debate: to persuade by reasoning.

REASONER.

REASONER.

To prove or influence by reasoning; argue; persuade or dissuade.

To use the reason; give reasons; argue.

A proof, argument; motive; priciple.

A cause or condition.

Mind; intellect; rational condition.

Reasonable conduct or speech.

Intelligence; faculty of judging; motive; argument; ground; right conduct; justice.

To discuse; persuade by reasoning.

To judge; debate.

Same etymon as Ratio. The faculty or property of the mind by means of which man perceives the distinction between right and wrong, in physics as well as in morals. Reason is a just conclusion resulting from the comparison of two ideas, by virtue of which we form a judgment.

n. [French] The gift or exercise of thought; understanding; intelligent;-the faculty which draws inferences from facts and premises, apprehends the relation between causes and effects, and devises means towards ends : - in English philosophy, the cognitive and perceptive faculties; the logical understanding:--in German philosophy, the intuitive or direct apprehension of mental or moral truth; the critical faculty, called pure reason, which judges of the conclusions of the logical understanding:- the cause or ground of an action;- the fundamental idea or principle of doctrinal or other system:- also, the alleged or ostensible cause; consideration: motive :-purpose; object;-ultimate end or design:- that which common sense or general opinion dictates; justice; right : -a proper or reasonable claim; moderation; - a fair or true account of a matter; rationale;-the exercise of the reasoning powers; ratiocination.