English Reference
noun · verb · adjective

bias

n. · v. · adj.
US /ˈbaɪəs/ UK /bˈaɪəs/ bias UK spelling biases

  1. 01 B2 Upper Intermediate

    n.a tendency to prefer one person or thing over another, often in a way that is unfair.

    n.a systematic prejudice or inclination for or against one person, group, or idea, typically in a manner considered to be unfair or subjective.

    Simple

    The reporter was accused of bias because he only interviewed people from one political party.

    In context

    The study was criticised for selection bias, as the researchers only recruited participants who already had a positive view of the product.

    prejudicepartialityleaning
  2. 02 C1 Advanced Technical

    n.a diagonal line across a piece of woven cloth.

    n.the diagonal direction of a woven fabric, 45 degrees to the warp and weft threads, providing more stretch and drape.

    Simple

    The dress was cut on the bias so that the fabric would flow beautifully over her body.

    In context

    Tailors often cut silk on the bias to exploit the natural elasticity of the weave, ensuring the garment contours to the wearer's figure.

    Usage

    often used in the phrase 'on the bias'

  3. 03 C1 Advanced AcademicTechnical Science

    n.a systematic error in a study that makes the results inaccurate.

    n.the difference between an estimator's expected value and the true value of the population parameter being estimated.

    Simple

    The survey had a clear bias because it only asked people who lived in expensive areas.

    In context

    To eliminate observer bias, the clinical trial utilised a double-blind methodology where neither the patients nor the doctors knew who received the treatment.

  4. 04 C2 Proficiency Technical Computing

    n.a steady voltage or current applied to a device to help it work correctly.

    n.a fixed DC voltage or current applied to a terminal of an electronic component to establish its operating point.

    Simple

    The engineer adjusted the bias of the transistor to improve the sound quality of the amplifier.

    In context

    Incorrect bias settings in the vacuum tube stage resulted in significant harmonic distortion during high-gain passages.

  5. 05 B1 Intermediate SlangInformal Music

    n.your favourite member of a music group, especially a K-pop band.

    n.a term used within fandoms to identify an individual's preferred member of a musical group.

    Simple

    I love the whole group, but Jungkook is definitely my bias.

    In context

    Fans often collect photocards specifically of their bias to trade with other members of the community.

  6. 06 B2 Upper Intermediate

    v.to influence someone or something so they are no longer neutral.

    v.to cause a person or process to have a prejudice or to be unfairly influenced.

    Simple

    The judge warned the jury not to let the media reports bias their decision.

    In context

    The wording of the questionnaire was found to bias the respondents toward a specific, predetermined conclusion.

  7. 07 C1 Advanced Technical

    adj.slanting or diagonal, especially when talking about cloth.

    adj.cut or positioned diagonally across the grain of a fabric.

    Simple

    She used a bias binding to finish the curved edges of the quilt.

    In context

    The designer preferred a bias cut for the evening gowns to achieve a more fluid silhouette.

    slantingobliquediagonal

Usage avoid bias · bias exist · cultural bias

He didn’t want to introduce bias into his decision-making.

The Guardian· 5 Sept 2026
This entry
Level B2 · Upper Intermediate
Frequency Common
Updated