English Reference
noun · adjective

axis

n. · adj.
US /ˈæksəs/ UK /ˈæksɪs/ ax·is

  1. 01 B2 Upper Intermediate Science

    n.an imaginary line that an object turns around.

    n.an imaginary or real line about which a body rotates.

    Simple

    The Earth spins on its axis once every twenty-four hours.

    In context

    The planet's tilt on its axis is responsible for the seasonal variations in temperature and daylight observed across both hemispheres.

    pivotcenterline
  2. 02 B2 Upper Intermediate Math

    n.one of the lines on a graph used to show the position of a point.

    n.a fixed reference line for the measurement of coordinates on a graph or in a geometric space.

    Simple

    The horizontal axis of the chart shows the months of the year.

    In context

    The researcher plotted the independent variable along the horizontal axis while tracking the rate of change on the vertical axis.

  3. 03 C2 Proficiency Technical Botany

    n.the main stem of a plant that branches grow out of.

    n.the central part or main stem of a plant around which other parts are arranged.

    Simple

    The flowers are arranged symmetrically around the central axis of the plant.

    In context

    In many species, the primary axis of the inflorescence determines the overall structural pattern of the flowering head.

  4. 04 C1 Advanced FormalAcademic

    n.a group of countries or people that work together for a common goal.

    n.an alliance or coalition between different nations or political groups.

    Simple

    The two nations formed a new economic axis to compete with larger neighbors.

    In context

    The diplomatic axis between the two capitals shifted significantly following the signing of the mutual defense treaty.

  5. 05 B2 Upper Intermediate

    n.the group of countries led by Germany, Italy, and Japan during World War II.

    n.the alliance of Germany, Italy, and Japan that opposed the Allies during the Second World War.

    Simple

    The Axis powers were defeated at the end of the war in 1945.

    In context

    Historians often analyze the strategic failures of the Axis command during the later stages of the European conflict.

    the allies
  6. 06 B2 Upper Intermediate

    adj.describing things that belong to the German-led alliance in World War II.

    adj.pertaining to the alliance of Germany, Italy, and Japan during the Second World War.

    Simple

    The museum has a collection of Axis military equipment from the 1940s.

    In context

    The intelligence report detailed the movement of Axis troops along the northern border during the winter offensive.

Usage central axis · horizontal axis · vertical axis

Scientists often refer to this two-way communication system as the gut-brain axis.

ScienceDaily· 4 Sept 2026
This entry
Level B2 · Upper Intermediate
Frequency Common
Updated