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noun Common

bias

BEYE-uhs

Bias (noun) means an unfair leaning toward or against something, often without a person even realizing it. Example: “The judge was accused of bias toward the defendant's family.”

noun
1
An unfair leaning toward or against something, often without a person even realizing it.
"The judge was accused of bias toward the defendant's family."
"Everyone has some bias, which is why blind reviews exist."
2
A diagonal direction across woven fabric, cut at 45 degrees to the straight threads.
"The skirt was cut on the bias so it would drape and flow."
3
In statistics, a systematic error that skews a measurement or estimate away from the true value.
"The survey had a sampling bias because it only called landlines."
verb
1
To unfairly influence someone or something in a particular direction.
"The leading question was designed to bias the witness's answer."

How to use bias

Learner’s notes

In plain EnglishA slant or lean toward one side — literally in fabric or a bowling ball, figuratively in judgment or opinion.

Common mistake

Bias doesn't always mean deliberate prejudice — it can be an unconscious or purely statistical skew.

Common pairings
unconscious bias cut on the bias bias toward something sampling bias

Word forms

more bias comparative, biased past tense, biassed past tense, biases plural, biasses plural, Biases plural, biases singular, biasses singular, most bias superlative

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Test yourself on “bias” A quick quiz — meaning, synonyms & usage

Fill the gap

Can you complete this real example?

The judge was accused of _____ toward the defendant's family.

Etymology

From Middle French biais, "sideways" or "at a slant," first used in English around 1520 for an oblique line, then borrowed into the game of bowls for a ball's curving path — which gave us the figurative "leaning" sense.

Origin: Middle French · First attested 1520

Class of 1520 bias joined the language around 1520.
See the full Class of 1520 →

Related words

Rhymes for bias

See all rhymes for bias →

Frequently asked questions

What does “bias” mean?

The word “bias” means an unfair leaning toward or against something, often without a person even realizing it. In plain terms, a slant or lean toward one side — literally in fabric or a bowling ball, figuratively in judgment or opinion.

How do you pronounce “bias”?

“Bias” is pronounced BEYE-uhs (/ˈbaɪ.əs/ in IPA).

How do you use “bias” in a sentence?

Here is “bias” used in a sentence: “The judge was accused of bias toward the defendant's family.”

What part of speech is “bias”?

Depending on how it is used, “bias” can be a noun and a verb.

Where does the word “bias” come from?

The word “bias” dates back to around 1520 and comes from Middle French. From Middle French biais, "sideways" or "at a slant," first used in English around 1520 for an oblique line, then borrowed into the game of bowls for a ball's curving path — which gave us the figurative "leaning" sense.

Is “bias” a common word?

“Bias” is a fairly common word in modern English.

How many meanings does “bias” have?

“Bias” has 4 distinct senses listed in this dictionary. The most common is: an unfair leaning toward or against something, often without a person even realizing it.

What is the difference between bias and prejudice?

Bias is an unfair leaning toward or against something, often unconscious, while prejudice is a stronger, usually negative judgment formed before knowing the facts. All prejudice involves bias, but bias can be milder and sometimes unnoticed even by the person holding it. Prejudice tends to describe firmer, more hostile attitudes.

Is bias always negative?

The most common sense of bias, an unfair leaning toward or against something, is negative because it suggests unfairness. However, bias can also be neutral in technical uses, such as the bias of fabric in sewing. Context determines whether bias carries a critical meaning.

What is the difference between bias and biased?

Bias is the noun for an unfair leaning toward or against something, while biased is the adjective describing a person or view that shows such leaning. You might say a report has a bias, or that a report is biased. A common mistake is writing bias when the adjective biased is needed.

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