|singlet (n., adj.)|
|Synonyms||singleton (n.); monomind (n.) SPuD (n.) (joke); Single Personality Disorder (n.) (joke)|
Singlet refers to a person who isn't plural, or in other words doesn't share their body with anyone else.
It's not a binary distinction, as people may be questioning being plural, and median can be viewed as a continuum with singlet at one end.
Singlet is not to be confused with singletsona, which is when a system tries to pass as singlet.