1. one of two children born at the same time to the same mother
2. one of two things that are very similar or identical

1. being one of two identical or very similar things
2. having two identical or similar parts

1. to join or combine two things together

Examples

• My sister and I are twins.
• The identical twins looked exactly alike.
• The twin towers stood side by side.
• She wore twin bracelets on each wrist.
• The city decided to twin with a sister city in Japan.
• These twin beds are perfect for the guest room.
• The twin engines powered the small aircraft.