The basis or motive for an action, decision, or conviction. See Usage Notes at because, why.
A declaration made to explain or justify action, decision, or conviction: inquired about her reason for leaving.
An underlying fact or cause that provides logical sense for a premise or occurrence: There is reason to believe that the accused did not commit this crime.
The capacity for logical, rational, and analytic thought; intelligence.
Good judgment; sound sense.
A normal mental state; sanity: He has lost his reason.
Logic A premise, usually the minor premise, of an argument.
To use the faculty of reason; think logically.
To talk or argue logically and persuasively.
Obsolete To engage in conversation or discussion.
To determine or conclude by logical thinking: reasoned out a solution to the problem.
To persuade or dissuade (someone) with reasons.
by reason of Because of.
in reason With good sense or justification; reasonably.
within reason Within the bounds of good sense or practicality.