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  1. SOLID Definition & Meaning - Merriam-Webster

    The meaning of SOLID is being without an internal cavity. How to use solid in a sentence.

  2. SOLID | definition in the Cambridge English Dictionary

    SOLID meaning: 1. hard or firm, keeping a clear shape: 2. completely hard or firm all through an object, or…. Learn more.

  3. Solid - Wikipedia

    Solid is a state of matter in which atoms are closely packed and are difficult to move past each other. Solids resist compression, expansion, or external forces that would alter its shape, with the degree …

  4. Solid | Definition & Facts | Britannica

    Jan 31, 2026 · Solids exhibit certain characteristics that distinguish them from liquids and gases. All solids have, for example, the ability to resist forces applied either perpendicular or parallel to a …

  5. solid - WordReference.com Dictionary of English

    Physics having relative firmness, coherence of particles, or persistence of form, as matter that is not liquid or gaseous: solid particles suspended in a liquid.

  6. SOLID definition in American English | Collins English Dictionary

    A solid is a substance that stays the same shape whether it is in a container or not. Solids turn to liquids at certain temperatures.

  7. Solid: Definition, Properties, Types, and Examples

    A solid is one of the fundamental states of matter, along with liquid and gas. It comprises particles such as atoms, ions, or molecules, packed closely together and held in fixed positions by …

  8. What Is a Solid? Definition and Examples in Science

    Oct 19, 2020 · Because its particles are packed close together, a solid is rigid, doesn’t flow, and isn’t easily compressed. A solid is defined as a state of matter with a definite shape and volume.

  9. What Does Solid Mean in Science: Definition & Examples

    4 days ago · In science, a solid is one of the three classic states of matter, defined by two key traits: it holds its own shape, and it has a fixed volume. Unlike liquids or gases, a solid doesn’t flow to fill a …

  10. Solid - definition of solid by The Free Dictionary

    Without a break or opening; completely or continuously: The theater was booked solid for a month.