[adverb] [not gradable]This medicine is for external use only and should not be taken internally.The latest nose reshaping techniques allow treatment to be carried out internally, thus avoiding any possibility of external marks.It's cheaper to develop our software internally (= in our own company) than to pay another company to do it.
INTERNALLY
Meaning of INTERNALLY in English
Cambridge English vocab. Кембриджский английский словарь. 2012