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REFERENCE

physics

n.
US //ˈfɪzɪks// UK //fˈɪzɪks// physics
  1. 1 the branch of science (n.)
    A2 Elementary Science

    the study of how the physical world works, covering energy, heat, light, and motion.

    the branch of science that deals with the nature and properties of matter and energy. Uncountable in this sense; treated as a singular noun.

    Example

    In our physics class today, we learned about how gravity keeps the planets in orbit.

    Example

    Theoretical physics often relies on complex mathematical models to predict the behavior of subatomic particles before they are observed in experiments.
    • natural science
    Pitfall
    Physics are my favorite subject.
    Physics is my favorite subject.

    Even though 'physics' ends in 's', it is a singular noun when referring to the subject of study.

  2. 2 physical properties of a system (n.)
    B2 Upper Intermediate Technical Science

    the way physical laws affect a specific object or situation.

    the physical properties, forces, or phenomena of a specific system or process.

    Example

    The physics of a bicycle are simple but very effective for moving fast.

    Example

    Engineers must carefully consider the physics of the bridge to ensure it can withstand high winds and heavy traffic loads.
Origin

1580s; from physic (see also -ics), from Middle English phisik, from Old French fisike (“natural science, art of healing”), from Latin physica (“study of nature”), from Ancient Greek φυσική (phusikḗ), feminine singular of φυσικός (phusikós, “natural; physical”), from Ancient Greek φύσις (phúsis, “origin; nature, property”), from Ancient Greek φύω (phúō, “produce; bear; grow”), ultimately from Proto-Indo-European *bʰuH- (“to appear, become, rise up”).

Word family

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