twin
/twɪn/ noun B1- Either of two people (or, less commonly, animals) who shared the same uterus at the same time; one who was born at the same birth as a sibling. · twin girls, twin daughters, twin sisters, twin boys, twin sons, twin brothers, twin babies, twin children· Katie is Jessica's twin.
- Either of two similar or closely related objects, plans, institutions, people, etc. · Your idea is the twin of mine.
- Either of two or more things, people, etc. that share a single feature. · He is my twin (wearing the same shirt, driving the same car, etc.).
- A friendly term of address, typically for men. · Yo, twin, lemme rap at ya.
- A room in a hotel, guesthouse, etc. with two beds; a twin room.
- A twin crystal.
- A two-engine aircraft.
- A twin-size mattress.
Plural twins
From the library
From this central block rose the twin towers, ancient, crenelated, and pierced with many loopholes.
It’s very trying to have a drunken husband, you see; and it must be very trying to have twins three times in succession, don’t you think?
Hammond had twins three times.
When you look after three pairs of twins you naturally get a lot of experience.
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