Definition of Irony
At the beginning of Chapter 6, Tess reflects on a thorny rose that, affixed to her breast, pricks her and draws blood. She views this as a bad omen, and the narrator takes this moment to foreshadow the tragic events that will soon befall her:
[Tess] fell to reflecting again, and in looking downwards a thorn of the rose remaining in her breast accidentally pricked her chin. Like all the cottagers of Blackmoor Vale, Tess was steeped in fancies and prefigurative superstitions; she thought this an ill-omen—the first she had noticed that day.
Angel Clare's very name serves as an example of situational irony in Tess of the D'Urbervilles, given that he refuses to enter into the Church as a profession. He also denounces the religious establishment, much to the sorrow of his traditional father:
Unlock with LitCharts A+Once upon a time Angel had been so unlucky as to say to his father, in a moment of irritation, that it might have resulted far better for mankind if Greece had been the source of the religion of modern civilization, and not Palestine; and his father's grief was of that blank description which could not realize that there might lurk a thousandth part of a truth, much less a half truth or whole truth, in such a proposition.