1 adverb in terms of astronomyó thaobh na réalteolaíochta de2 adverb extremely, hugelythar a bheith c m uuafásach c m umillteanach c m uthey're astronomically expensivetá siad thar a bheith costasachthe rates have risen astronomicallytá ardú as cuimse tagtha ar na rátaí