(The full meaning of this card is under construction. Selected quotes to follow.)
Fenton-Smith (see Sources), a portion of his lengthy description - "General meaning - The Justice card indicates that events have worked out as they were meant to. That is, your past decisions or actions have led you to this point. You have what you deserve and, if you are completely honest with yourself, you know this. It represents a time for absolute honesty with yourself and with the people around you. It is time to take responsibility for yourself and the decisions that have led you to this point. Your future can be changed by your present decisions, actions or understanding.
"The Justice card can also suggest legalities or a legal decision in your favour, or the purchase of something which requires the signing of legal documents. It may mean successfully resolving an argument or disagreement, or taking responsibility for your part in a situation. This card can refer to balancing material possessions, or balancing your spiritual scales of karma. If Justice appears with the Six of Wands it can suggest a job promotion, which is the result of decisions or past actions (that is, hard work bringing rewards)." (Fenton-Smith, pp. 231-32)