Merriam-Webster Collegiate Dictionary - correct

 I. transitive verb  Etymology: Middle English, from Latin ~us, past participle of corrigere, from com- + regere to lead straight — more at right  Date: 14th century  1.  a. to make or set right ; amend ~ an error  b. counteract, neutralize ~ a harmful tendency  c. to alter or adjust so as to bring to some standard or required condition ~ a lens for spherical aberration  2.  a. to punish (as a child) with a view to reforming or improving  b. to point out usually for amendment the errors or faults of spent the day ~ing tests  • ~able adjective  • ~or noun Synonyms:  ~, rectify, emend, remedy, redress, amend, reform, revise mean to make right what is wrong. ~ implies taking action to remove errors, faults, deviations, defects ~ your spelling. rectify implies a more essential changing to make something right, just, or properly controlled or directed rectify a misguided policy. emend specifically implies ~ion of a text or manuscript emend a text. remedy implies removing or making harmless a cause of trouble, harm, or evil set out to remedy the evils of the world. redress implies making compensation or reparation for an unfairness, injustice, or imbalance redress past social injustices. amend, reform, revise imply an improving by making ~ive changes, amend usually suggesting slight changes amend a law, reform implying drastic change plans to reform the court system, and revise suggesting a careful examination of something and the making of necessary changes revise the schedule.  Synonym: see in addition punish.  II. adjective  Etymology: Middle English, ~ed, from Latin ~us, from past participle of corrigere  Date: 1668  1. conforming to an approved or conventional standard ~ behavior  2. conforming to or agreeing with fact, logic, or known truth a ~ response  3. conforming to a set figure enclosed the ~ return postage  4. conforming to the strict requirements of a specific ideology or set of beliefs or values environmentally ~ spiritually ~  • ~ly adverb  • ~ness noun Synonyms:  ~, accurate, exact, precise, nice, right mean conforming to fact, standard, or truth. ~ usually implies freedom from fault or error ~ answers socially ~ dress. accurate implies fidelity to fact or truth attained by exercise of care an accurate description. exact stresses a very strict agreement with fact, standard, or truth exact measurements. precise adds to exact an emphasis on sharpness of definition or delimitation precise calibration. nice stresses great precision and delicacy of adjustment or discrimination makes nice distinctions. right is close to ~ but has a stronger positive emphasis on conformity to fact or truth rather than mere absence of error or fault the right thing to do.