therefore Meaning, Definition & Usage

  1. adverb (used to introduce a logical conclusion) from that fact or reason or as a result
    hence; so; thus; thence.
    • 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
  2. adverb as a consequence
    consequently.
    • 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

WordNet

There"fore conjunction & adverb
Etymology
OE. therfore. See There, and Fore, adv., For, and cf. Therefor.
Definitions
  1. For that or this reason, referring to something previously stated; for that.
    I have married a wife, and therefore I can not come. Luke xiv. 20.
    Behold, we have forsaken all, and followed thee; what shall we have therefore? Matt. xix. 27.
  2. Consequently; by consequence.
    He blushes; therefore he is guilty. Spectator.
    Syn. -- See Then.

Webster 1913