|Origin:||singuler, from Latin singularis, from singulus; SINGLE1|
a singular noun, verb, form etc is used when writing or speaking about one person or thing [↪ plural]:
the singular form of the noun
If the subject is singular, use a singular verb.
2 [usually before noun] formal
very great or very noticeable:
He showed a singular lack of tact in the way he handled the situation.
a singular achievement
very unusual or strange:
I wondered why she was behaving in so singular a fashion.