i Register
In some senses, thence is marked as formal, literary, archaic. Watch for register when choosing this word.
adv
From there, from that place or from that time.
I came thence.
Cross fix at 6000 feet, thence descend to 3000 feet and fly direct to MAP (missed approach point).
Deriving from this fact or circumstance; therefore, therefrom.
I had a really bad car accident, and thence came all my backpains.
From that time; thenceforth; thereafter.