1 noun also MATH around circle etcimlíne fem4 c m ua circle with a circumference of 15 cmciorcal a bhfuil 15 cm ina imlíne, ciorcal a bhfuil imlíne 15 cm annthe circumference of the earthimlíne an domhain2 noun edgeimeall masc1 c m ucheck the circumference of the tyreseiceáil timpeall an bhoinn