What does Sidereal mean?

Definitions for Sidereal
saɪˈdɪər i əlside·re·al

This dictionary definitions page includes all the possible meanings, example usage and translations of the word Sidereal.

Princeton's WordNet

  1. siderealadjective

    of or relating to the stars or constellations

    "sidereal bodies"; "the sidereal system"

  2. siderealadjective

    (of divisions of time) determined by daily motion of the stars

    "sidereal time"


  1. siderealadjective

    Of or relating to the stars.

  2. siderealadjective

    Relating to a measurement of time relative to the position of the stars.

  3. Etymology: sidereus, from sidus, sider-, star


  1. sidereal

    Sidereal refers to anything related to stars or constellations. More specifically, it is often used in the context of time measurement, where a sidereal day is the time it takes for the Earth to make one complete rotation in relation to the stars, which is approximately 23 hours, 56 minutes. Similarly, a sidereal year is the time it takes for the Earth to orbit the sun once with respect to the distant stars, which is roughly 365.25 days.

Webster Dictionary

  1. Siderealadjective

    relating to the stars; starry; astral; as, sidereal astronomy

  2. Siderealadjective

    measuring by the apparent motion of the stars; designated, marked out, or accompanied, by a return to the same position in respect to the stars; as, the sidereal revolution of a planet; a sidereal day

  3. Etymology: [L. sidereus, from sidus, sideris, a constellation, a star. Cf. Sideral, Consider, Desire.]

Chambers 20th Century Dictionary

  1. Sidereal

    sī-dē′rē-al, adj. relating to a star or stars: starry: (astron.) measured by the apparent motion of the stars.—adj. Sid′eral (Milt.), relating to the stars: baleful, from astrology.—n. Siderā′tion, a sudden deprivation of sense, as a stroke of apoplexy: a blast of plants.—Sidereal day, the time between two successive upper culminations of a fixed star or of the vernal equinox, shorter than a solar day; Sidereal year (see Year). [L. sidus, sideris, a star.]

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  1. Chaldean Numerology

    The numerical value of Sidereal in Chaldean Numerology is: 6

  2. Pythagorean Numerology

    The numerical value of Sidereal in Pythagorean Numerology is: 1

Examples of Sidereal in a Sentence

  1. Philipus Aureolus Paracelsus:

    Thoughts give birth to a creative force that is neither elemental nor sidereal. Thoughts create a new heaven, a new firmament, a new source of energy, from which new arts flow. When a man undertakes to create something, he establishes a new heaven, as it were and from it the work that he desires to create flows into him. For such is the immensity of man that he is greater than heaven and earth.

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Translations for Sidereal

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"Sidereal." Definitions.net. STANDS4 LLC, 2023. Web. 5 Dec. 2023. <https://www.definitions.net/definition/Sidereal>.

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    an outward bevel around a door or window that makes it seem larger
    • A. sesquipedalian
    • B. commensal
    • C. splay
    • D. inexpiable

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