Definitions

1. noun

A person or animal that is one of a pair of siblings born at the same time, especially one of a pair of human babies born in the same birth.

“She had twins last year.”

2. noun

A person or thing that is similar or closely associated with another.

“The twin cities of Paris and Lyon are major cultural centers in France.”

3. verb

To make or become a twin.

“She is expecting to twin her baby in the next few months.”

4. verb

To divide or separate something into two equal parts.

“The road was twinned by the construction of a parallel road.”

5. adjective

Being one of a pair of identical or similar things.

“The twin engines of the plane provide powerful propulsion.”