1. noun frequency2. noun MATH, PHYSIOL, LING in time, arrangement, etc3. noun FIN, COMM of expenditure, accounts, etc4. noun of shapes, features, etc5. noun in concepts, behaviour, etc over time1 noun frequencyrialtacht fem3 c m uminicíocht fem3 c m uit happens with worrying regularityis ábhar imní é go dtarlaíonn sé chomh minic sin2 noun also MATH, PHYSIOL, LING in time, arrangement, etcrialtacht fem3 c m uthe regularity of your breathingrialtacht do chuid análathere are issues with the regularity of the servicetá deacrachtaí ann le rialtacht na seirbhísewith great regularitygo han-rialta3 noun FIN, COMM of expenditure, accounts, etcrialtacht fem3 c m u4 noun of shapes, features, etcrialtacht fem3 c m uthe regularity of the shapes is crucialtá rialtacht na gcruthanna tábhachtach, ní mór na cruthanna a bheith rialtathey noted the regularity of her featuresthug siad faoi deara chomh rialta is a bhí na ceannaithe aici5 noun in concepts, behaviour, etc over timerialtacht fem3 c m uit reveals a certain regularity in our behaviourléiríonn sé rialtacht áirithe inár n-iompar