English Reference
adjective

nonlinear

adj.
US /nɑnˈɫɪˌniɝ/ non·lin·ear

  1. 01 C1 Advanced AcademicTechnical Math

    describes a relationship where the output is not directly proportional to the input.

    describing a system or function where the output does not change in direct proportion to the input, often involving variables with exponents other than one.

    Simple

    The relationship between the two chemicals is nonlinear, so doubling one does not double the reaction.

    In context

    In nonlinear dynamics, small perturbations in the initial conditions can lead to vastly different outcomes, a phenomenon commonly known as the butterfly effect.

    Usage

    Typically used as a non-gradable adjective in scientific contexts.

    disproportionalexponential
  2. 02 C1 Advanced Academic

    describes a story or process that does not follow a straight, chronological order.

    describing a narrative structure or progression that deviates from chronological sequence, often employing flashbacks or parallel timelines.

    Simple

    The movie has a nonlinear plot that jumps between the past and the present.

    In context

    Modernist literature frequently employs nonlinear structures to reflect the fragmented nature of human memory and consciousness.

  3. 03 C1 Advanced Technical Science

    describes points or atoms that do not lie on a single straight line.

    denoting a set of points or a molecular structure where the constituent parts are not arranged in a straight line.

    Simple

    Water is a nonlinear molecule because its atoms are arranged in a V-shape.

    In context

    The researcher noted that the three points were nonlinear, forming a distinct triangle rather than a single vector.

As laser energies grow, nonlinear effects within the fiber become stronger.

Phys.org· 30 Aug 2026

Informed by learning theory, the chapter extends Wittman's prior research on career transitions, emphasizing the learning that takes place amid the growing trend of nonlinear career paths and the professional identity changes they entail.

Phys.org· 18 Aug 2026

From non- + linear.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Frequent
Updated