physical change

American  

[fiz-i-kuhl cheynj] / ˈfɪz ɪ kəl ˈtʃeɪndʒ /

noun

Chemistry.

1. a usually reversible change in the physical properties of a substance, as size or shape.

   Freezing a liquid is a physical change.

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Usage

What is a physical change? A physical change is a change to the physical—as opposed to chemical—properties of a substance. They are usually reversible. The physical properties of a substance include such characteristics as shape (volume and size), color, texture, flexibility, density, and mass. Physical changes are not to be confused with chemical changes, which form whole new substances.

Etymology

Origin of physical change

First recorded in 1750–60

Compare meaning

How does physical-change compare to similar and commonly confused words? Explore the most common comparisons:

• physical change vs. chemical change

Example Sentences

Decades of science since those days of placebo panic suggest that beliefs can manifest physical change; after all, the mind and body are connected.

From Slate • Jan. 30, 2026

Discomfort with one’s body was increasingly reframed by clinicians and activists as a psychological flaw, and the desire for physical change treated with suspicion, as if it betrayed a lack of self-acceptance.

From The Wall Street Journal • Jan. 2, 2026

Yeo says he's spotted "a physical change" in politicians he's painted in the past.

From BBC • May 14, 2024

“This study provides evidence that there is a physical change that can be observed in the days before an earthquake, but further scientific study is needed to understand this process.”

From Los Angeles Times • Oct. 13, 2022

If telepathy take place we have two physical facts—the physical change in the brain of A, the suggester, and the analogous physical change in the brain of B, the recipient of the suggestion.

From Mysterious Psychic Forces An Account of the Author's Investigations in Psychical Research, Together with Those of Other European Savants by Flammarion, Camille