(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"
from here, from this place, away
"Hence we walked through the forest until we reached the river."
In plain English: Hence means therefore, showing that something happens as a result of what was just said.
"The traffic was heavy, so we arrived late hence missing the start of the movie."
Go away! Begone!
"The king waved his sword and shouted, hence to all who stood before him."
A male given name.
"Since his grandfather was named Hence, he decided to carry on the family tradition by choosing that same first name for himself."
Hence comes from Old English heonan, which meant "away." It is a later Middle English spelling of hennes, formed by combining henne with an adverbial genitive ending.