1. (noun)reason, ground a rational motive for a belief or action Synonyms: ground, priming coat, intellect, primer, cause, background, reasonableness, undercoat, basis, grounds, solid ground, dry land, primer coat, footing, land, priming, soil, reason, rationality, flat coat, understanding, earth, terra firma
2. (noun)reason an explanation of the cause of some phenomenon Synonyms: cause, grounds, ground, intellect, understanding, reasonableness, rationality
3. (noun)reason, understanding, intellect the capacity for rational thought or inference or discrimination Synonyms: intellect, rationality, savvy, apprehension, discernment, cause, reason, grounds, reasonableness, intellectual, agreement, ground, mind, sympathy, understanding
4. (noun)rationality, reason, reasonableness the state of having good sense and sound judgment Synonyms: tenability, intellect, rationality, moderateness, modestness, rationalness, reason, grounds, reasonableness, tenableness, ground, cause, understanding
5. (noun)cause, reason, grounds a justification for something existing or happening Synonyms: ground, suit, intellect, causal agency, yard, crusade, drive, effort, causa, evidence, case, campaign, reasonableness, movement, curtilage, reason, rationality, grounds, lawsuit, understanding, cause, causal agent
6. (verb)reason a fact that logically justifies some premise or conclusion Synonyms: cause, grounds, ground, intellect, understanding, reasonableness, rationality
7. (verb)reason, reason out, conclude decide by reasoning; draw or come to a conclusion Synonyms: conclude, resolve, reason, reason out, argue, close
1. reason The efficient cause, that which makes anything to be or be done, is the common meaning of the word, as in the saying "There is no effect without a cause." Every man instinctively recognizes himse Synonyms: cause, actor, causality, designer, occasion, precedent, agent, causation, former, origin, reason, antecedent, condition, fountain, originator, source, author, creator, motive, power, spring Antonyms: consequence, development, end, fruit, outcome, product, creation, effect, event, issue, outgrowth, result
Synonyms for reason 
