-or

1. An act, assertion, or belief that unintentionally deviates from what is correct, right, or true.
2. The condition of having incorrect or false knowledge.
3. The act or an instance of deviating from an accepted code of behavior.
4. Something unintentionally done wrong; for example, as a result of poor judgment or lack of care.
5. A belief or opinion that is contrary to fact or to established doctrine.
6. The state of holding incorrect beliefs or opinions, or the fact of acting wrongly or misguidedly caused by human error.
7. The state or fact of being a mistake, or of being inappropriate or unacceptable.
8. In baseball, a fielding misplay, called when the official scorer judges that a play should have either led to an out or prevented a runner from advancing.
9. The failure of a computer program, subroutine, or system to produce an anticipated result.
10. A variation between the true value of a mathematical quantity and a calculated or measured value.
11. Etymology: from Old French errur, from Latin errorem, "a wandering, straying, mistake"; from errare, "to wander".

1. Extremely violent outbursts of anger, violent anger; frenzy; often without provocation.
2. A condition, or state, of intense excitement or activity: "There was a furor surrounding the release of the latest Beetle album."
3. A general commotion; public disorder or uproar.
4. A condition or state of violent anger; rage.
5. A state of intense excitement or ecstasy.
6. An angry or indignant public reaction to something: "The jury verdict of not guilty created a furor in the courtroom."
7. The manic phase of manic depressive illness; maniacal attack.

1. A tooth for cutting or gnawing; located in the front of the mouth in both jaws.
2. One of the flat sharp-edged teeth in the front of the mouth, used for cutting and tearing food.
3. In mammals, one of the four sharp teeth located between the canines in each jaw at the front of the mouth.
4. A tooth adapted for cutting or gnawing, located at the front of the mouth along the apex of the dental arch.
5. From Modern Latin incisor, literally, "that which cuts into," from Latin incisus, past participle of incidere.

1. Someone who helps to open up a new line of research or technology or art.
2. Anyone who introduces changes and new ideas.
3. Someone who begins or introduces something new for, or as if for, the first time.

1. A person who intervenes between two parties; especially, for the purpose of effecting reconciliation; an intercessor.
2. A person who brings about an agreement, treaty, etc., or settles a dispute by mediation.
3. An intermediate agent; something which effects a transition between one stage or state and another.
4. In physiology and chemistry, an enzyme, hormone, or other chemical substance which acts as an intermediate or carrier in, or otherwise influences, a chemical, physiological, or pathological process.

A mediator suggests compromises, acts as a go-between, and tries to get both sides to agree to something.