Calcutta

This term refers to the historical name of the city now officially known as Kolkata. While "Calcutta" remains widely recognized globally and is still used in historical contexts or by older generations, "Kolkata" is the standard official designation used within India to better reflect the local Bengali pronunciation.

As a proper noun referring to a specific geographic location, the word is used exclusively in the singular. It does not function as a common noun and therefore does not have a plural form.