What is ruler?

  • (noun): Measuring stick consisting of a strip of wood or metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths.
    Synonyms: rule
    See also — Additional definitions below


A ruler, sometimes called a rule or line gauge, is an instrument used in geometry, technical drawing, printing and engineering/building to measure distances and/or to rule straight lines. Strictly speaking, the ruler is essentially a straightedge used to rule lines, but typically the ruler also contains calibrated lines to measure distances.

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Some articles on ruler:

Ruler - Philosophy
... Ludwig Wittgenstein famously used rulers as an example in his discussion of language games in the Philosophical Investigations ... out that the standard meter bar in Paris was the criterion against which all other rulers were determined to be one meter long, but that there was no analytical way to demonstrate that the standard ...
... First ruler of the Mon kingdom of Hariphunchai (Pali Haripunjaya) ... Haripunchai), while the other became ruler of Lampang ...
Giovanni I Bentivoglio
... Giovanni I (died June 26, 1402) was the first ruler of Bologna from the Bentivoglio family, who rose to power among the faction-conflicts within the commune of Bologna ... On March 14, 1401, he declared himself the ruler as signore and Gonfaloniere di Giustizia and secured his reign with the aid of the Visconti family ... Preceded by To the Papal States Ruler of Bologna 1401–1402 Succeeded by Antongaleazzo Bentivoglio Persondata Name Giovanni I Bentivoglio Alternative names Short description Ruler of Bologna, 1401-1402 Date ...
Juan De Guzmán
... Don Juan de Guzmán Itztolinqui (reigned 1526–1569) was a post-Conquest tlatoani (ruler) of the altepetl (ethnic state) of Coyoacán in the Valley of Mexico ... Juan de Guzmán's father was Quauhpopocatzin, a previous ruler of Coyoacán, and his mother was a daughter of Huitzilatzin, a ruler of Huitzilopochco ... He was thus a great-great-grandson of Huitzilihuitl, the second Aztec ruler of Tenochtitlan ...
Chihab Al-Umari
... of the previous mansa Kankan Musa claimed that the previous ruler had abdicated the throne to journey to a land across the ocean, leading contemporary Malian historian Gaoussou Diawara to theorize that Abubakari ... says "In the North of Mali there live white Berbers under their ruler ... I asked their ruler Sultan Musa Ibn Amir Hajib (who was in Egypt returning from the pilgrimage) "How had you become ruler?" He replied "We belong to a family where the son succeeds the father in power ...

More definitions of "ruler":

  • (noun): A person who rules or commands.
    Synonyms: swayer

Famous quotes containing the word ruler:

    Know yourself and fit yourself to new fashions. For there is a new ruler among the gods.
    Aeschylus (525–456 B.C.)

    Despots play their part in the works of thinkers. Fettered words are terrible words. The writer doubles and trebles the power of his writing when a ruler imposes silence on the people. Something emerges from that enforced silence, a mysterious fullness which filters through and becomes steely in the thought. Repression in history leads to conciseness in the historian, and the rocklike hardness of much celebrated prose is due to the tempering of the tyrant.
    Victor Hugo (1802–1885)

    The mob in silence leaves their prince’s side,
    And to the coming ruler gives its love,
    And is with mobs the custom.
    Publius Papinius Statius (c. 40–96)