reason (Noun) — A rational motive for a belief or action. ex. "the reason that war was declared"
reason (Noun) — An explanation of the cause of some phenomenon. ex. "the reason a steady state was never reached was that the back pressure built up too slowly"
reason (Noun) — The capacity for rational thought, inference or discrimination. ex. "we are told that man is endowed with reason and capable of distinguishing good from evil"
reason (Noun) — The state of having good sense and sound judgment. ex. "he had to rely less on reason than on rousing their emotions"
reason (Noun) — A justification for something existing or happening. ex. "they had good reason to rejoice"
reason (Noun) — A fact that logically justifies some premise or conclusion. ex. "there is reason to believe he is lying"
reason (Verb) — Decide by reasoning; draw or come to a conclusion. ex. "We reasoned that it was cheaper to rent than to buy a house"
reason (Verb) — Present reasons and arguments.
reason (Verb) — Think logically. ex. "The children must learn to reason"