correct

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To make or put right.
• intransitive verb To remove the errors or mistakes from.
• intransitive verb To indicate or mark the errors in.
• intransitive verb To speak to or communicate with (someone) in order to point out a mistake or error.
• intransitive verb To scold or punish so as to improve or reform.
• intransitive verb To remedy or counteract (a defect, for example).
• intransitive verb To adjust so as to meet a required standard or condition.
• intransitive verb To make corrections.
• intransitive verb To make adjustments; compensate.
• adjective Free from error or fault; true or accurate.
• adjective Conforming to standards; proper.

from The Century Dictionary.

• To make straight or right; remove error from; bring into accordance with a standard or original; point out errors in.
• Specifically— To note or mark errors or defects in, as a printer's proof, a book, a manuscript, etc., by marginal or interlinear writing.
• To make alterations in, as type set for printing, according to the marking on a proof taken from it; make the changes required by: as, to correct a page or a form; to correct a proof.
• To point out and remove, or endeavor to remove, an error or fault in: as, to correct an astronomical observation.
• To destroy or frustrate; remove or counteract the operation or effects of, especially of something that is undesirable or injurious; rectify: as, to correct abuses; to correct the acidity of the stomach by alkaline preparations.
• Specifically, in optics, to eliminate from (an eyepiece or object-glass) the spherical or chromatic aberration which tends to make the image respectively indistinct or discolored. See aberration, 4.
• To endeavor to cause moral amendment in; especially, punish for wrong-doing; discipline.
• Synonyms Improve, Better. See amend.
• noun Correction.
• In accordance or agreement with a certain standard, model, or original; conformable to truth, rectitude, or propriety; not faulty; free from error or misapprehension; accurate: as, the correct time.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Set right, or made straight; hence, conformable to truth, rectitude, or propriety, or to a just standard; not faulty or imperfect; free from error.
• transitive verb To make right; to bring to the standard of truth, justice, or propriety; to rectify.
• transitive verb To remove or retrench the faults or errors of; to amend; to set right.
• transitive verb To bring back, or attempt to bring back, to propriety in morals; to reprove or punish for faults or deviations from moral rectitude; to chastise; to discipline.
• transitive verb To counteract the qualities of one thing by those of another; -- said of whatever is wrong or injurious.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Free from error; true; the state of having an affirmed truth.
• adjective With good manners; well behaved; conforming with accepted standards of behaviour.
• verb transitive To make something that was not valid become right. To remove error.
• verb by extension, transitive To grade (examination papers).
• verb transitive To inform (someone) of the latter's error.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective socially right or correct
• adjective correct in opinion or judgment
• verb alter or regulate so as to achieve accuracy or conform to a standard
• verb adjust for
• verb treat a defect
• adjective free from error; especially conforming to fact or truth
• verb go down in value
• verb punish in order to gain control or enforce obedience
• verb make reparations or amends for
• verb censure severely
• adjective in accord with accepted standards of usage or procedure
• verb make right or correct