What is remission ? is it where ra is being slowed down but not stopped ? or it can be stopped?

Any disease can be -: In remission, where the problem is in relatively quiescent stage. An example is bonfire (acute condition) verses smoldering fire (in remission). Its still there and can get reactivated (into an acute, more symptomatic phase easily) if conditions are right for it. Medications can help as well as your rheumatologist can advise you properly.

See details: Remission is really defined as the absence of any evidence of disease activity. Technically, remissions are associated with a markedly reduced risk of disease progression.