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a physical phenomenon

Quantum entanglement is a physical phenomenon that occurs when pairs or groups of particles are generated or interact in ways such that the quantum state of each particle cannot be described independently of the others, even when the particles are separated by a large distance—instead, a quantum state must be described for the system as a whole.

a physical event during which pairs (or groups) of particles interact in a way where the quantum state of each particle cannot be described independently of any of the other particles, even if the particles are separated by a large distance

Quantum entanglement is a physical event during which pairs (or groups) of particles interact in a way where the quantum state of each particle cannot be described independently of any of the other particles, even if the particles are separated by a large distance.

a phenomenon in which two particles at a distance are inter-related

For example, quantum entanglement is a phenomenon in which two particles at a distance are inter-related.

a quantum mechanical phenomenon where the quantum states of a couple of objects need to be described with reference to one another

Quantum entanglement is a quantum mechanical phenomenon where the quantum states of a couple of objects need to be described with reference to one another, although the individual objects may be spatially separated.

a quantum mechanical phenomenon with applications in various fields

Quantum entanglement is a quantum mechanical phenomenon with applications in various fields.

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a quantum mechanical phenomenon in which two particles can no longer be described as individual particles with definite states, but rather only as an overall system

Quantum entanglement is a quantum mechanical phenomenon in which two particles can no longer be described as individual particles with definite states, but rather only as an overall system.

a physical phenomenon that occurs at molecular level, where two spatially separate particles form a special connection and act and react in unison

Quantum entanglement is a physical phenomenon that occurs at molecular level, where two spatially separate particles form a special connection and act and react in unison.

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a phenomenon where two particles become linked together and act like a single system

Quantum entanglement is a phenomenon where two particles become linked together and act like a single system.

the basis for storage and processing of quantum information

As Si explained 'Quantum entanglement is the basis for storage and processing of quantum information.'

one of the most curious aspects of quantum physics

Quantum entanglement is one of the most curious aspects of quantum physics, leading to some seemingly bizarre consequences – like how measuring certain physical properties of one particle affects the other, no matter how far apart the two are.