What is the meaning of therefore?

adverb

• Used to introduce a logical conclusion. ( from that fact or reason or as a result)
  • usage: "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: hence, thence, thus, so
• As a consequence.
  • usage: "he had good reason to be grateful for the opportunities which they had made available to him and which consequently led to the good position he now held"
  • synonyms: consequently