Pronunciation: [ˌɒn ɹˈə͡ʊl] (IPA) 
The correct spelling of the phrase "on roll" is actually "on a roll." This phrase means that someone is experiencing a period of success, and things are going well for them. The "a" in "on a roll" is pronounced like "uh," using the IPA phonetic transcription of /ə/. This small but important detail can help ensure that the phrase is spelled and understood correctly in any written communication.
"On roll" is an idiom commonly used to describe someone who is officially listed as a member of a particular group or organization. It is often used in the context of educational institutions or workplaces to refer to individuals who are officially enrolled or employed.
In the context of education, being "on roll" generally means that a student is registered and attending a particular school or college. It signifies that the individual's name is included in the official records of the educational institution and they are recognized as an active student. This term is often used to keep track of the number of students enrolled in a school and to determine statistics related to student population.
Similarly, in a workplace setting, being "on roll" refers to an individual who is officially employed by a company or organization. It indicates that the person's name is registered on the company's payroll system, being recognized as an active employee with all the associated rights and benefits. This term is used to determine the number of employees within an organization and to maintain accurate employment records.
Overall, the phrase "on roll" implies a formal and official status within a specific group or organization, usually accompanied by registration, enrollment, or employment. It serves as a means of categorizing and maintaining records of individuals belonging to a collective entity.
The term "on roll" does not have a specific etymology as it is a phrase formed by combining the preposition "on" and the noun "roll". However, depending on the context, "on roll" could have multiple meanings.
If you are referring to someone being "on roll" in an educational or institutional sense, it typically means that the person is currently enrolled, registered, or included on an official list or roster. In this context, "on roll" can be traced back to the Middle English word "roll", which derived from Old French "role" meaning "scroll" or "list".
On the other hand, if you are referring to something being "on a roll", it means that a person or a group is experiencing a continuous string of successes or achievements.
