Hence (Adverb)
Meaning 1
(used to introduce a logical conclusion) from that fact or reason or as a result; "therefore X must be true"; "the eggs were fresh and hence satisfactory"; "we were young and thence optimistic"; "it is late and thus we must go"; "the witness is biased and so cannot be trusted".
Synonyms
Meaning 3
From this time; "a year hence it will be forgotten".