transcription, транскрипция: [ hɪə(r)tu:fɔ:(r) ]
Heretofore means ‘before this time’ or ‘up to now’. ( mainly AM FORMAL )
They reported that clouds are an important and heretofore uninvestigated contributor to the climate.
= hitherto, previously
ADV : usu ADV with v , also ADV adj , ADV with cl