SOUNDLY Meaning of SOUNDLY in English ad. 1.Thoroughly, satisfactorily, well.2.Healthily, heartily.3.Severely, lustily, smartly, stoutly.4.Truly, correctly, rightly.5.Firmly, strongly.6.Fast, deeply, profoundly. Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012