noun
physics
FIHZ-ihks
noun
1
The branch of science that studies matter, energy, space, and time, and how they interact.
"She's studying physics at university."
"Physics explains why objects fall at the same rate regardless of weight."
2
The physical principles or behavior underlying a particular thing or system.
"Engineers had to understand the physics of the bridge before building it."
How to Use Physics
Learner’s notesIn plain EnglishThe science of how matter and energy behave.
Common pairings
quantum physics
laws of physics
physics degree
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Etymology
From Middle English phisik, ultimately from Greek phusike ("natural science"), from phusis ("nature").