(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 that place or from there; "proceeded thence directly to college"; "flew to Helsinki and thence to Moscow"; "roads that lead therefrom"
from that circumstance or source; "atomic formulas and all compounds thence constructible"- W.V.Quine; "a natural conclusion follows thence"; "public interest and a policy deriving therefrom"; "typhus fever results therefrom"
underestimate the real value or ability of; "Don't sell your students short--they are just shy and don't show off their knowledge"
sell securities or commodities or foreign currency that is not actually owned by the seller, who hopes to cover (buy back) the sold items at a lower price and thus to earn a profit