# physics

/ˈfɪzɪks/ (US) · /fˈɪzɪks/ (UK)

Source: https://englishreference.com/word/physics
Updated: 2026-06-19

## Senses

### 1. the branch of science

noun · CEFR A2

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

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

- In our physics class today, we learned about how gravity keeps the planets in orbit.
- Theoretical physics often relies on complex mathematical models to predict the behavior of subatomic particles before they are observed in experiments.

### 2. physical properties of a system

noun · CEFR B2 · Technical

the way physical laws affect a specific object or situation.

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

- The physics of a bicycle are simple but very effective for moving fast.
- Engineers must carefully consider the physics of the bridge to ensure it can withstand high winds and heavy traffic loads.

## Examples

- She is studying physics at university.
- Understanding the laws of physics helps engineers design safer cars and faster airplanes.
- Theoretical physics often relies on complex mathematical models to predict the behavior of particles that are too small to be observed directly with current technology.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.