Meaning & use
quantum
The smallest possible discrete quantity of a physical property, such as energy, in physics.
See it in a sentence
Einstein showed that light travels in discrete packets, or quanta, rather than a continuous wave.
Engineers are racing to build computers that exploit quantum effects to solve problems faster.
A note on using this word
In everyday speech, quantum leap loosely means a dramatic change, though in physics a quantum is actually the smallest possible unit.
Words with a similar meaning
This term is best learned through its definition and examples.
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Another way to use it
2. adjective
Relating to quantum mechanics or the behavior of matter at the atomic and subatomic scale.
The lab is developing quantum sensors that can detect tiny changes in magnetic fields.
Make it your own
Write a sentence using “quantum”, then compare your use with the examples above.