Meaning oftwinin English

Noun

1. two people born at the same time; siblings
2. two similar or closely related objects
3. a hotel room with two beds
   The hotel room was a twin with two single beds.
4. a mattress size for two people
   The mattress company offered a twin size mattress for small bedrooms.
5. a two-engine airplane
   The air force deployed a twin to patrol the border.