singleton

noun

1. 1

   A playing card that is the only one of its suit in a hand, especially at bridge.

2. 2

   A hand containing only one card of a certain suit.

3. 3

   A single object, especially one of a group.

4. 4

   A class that may not be instantiated more than once, i.e. that implements the singleton design pattern.

5. 5

   A set with exactly one element.

6. 6

   A child or animal that is born singly, not as a twin or other multiple birth.

   “singleton preterm birth”

7. 7

   A person without a romantic partner.

8. 8

   A person without a dissociative identity.

9. 9

   A single consonant, as opposed to a geminated consonant.

   “singleton sonorants”