What does Mosammat mean as a prefix in Muslim name?

"Mosammat" is not a prefix in Muslim names. It's a title used in Bangladesh and India (particularly in West Bengal) to address a married woman.

It's similar to "Mrs." in English.

For example, "Mosammat Farzana" would be used to address a married woman named Farzana.

It's important to note that this title is not used universally in all Muslim communities and is specific to certain regions.