1. An uncommon or infrequently discussed subject matter, topic, or motif in literature, art, music, or discourse
The author explored a rare theme of forgiveness in her novel.
A autora explorou um tema raro de perdão em seu romance.
2. A subject that is seldom treated or addressed in creative or academic works
Medieval poetry rarely touched upon this rare theme.
A poesia medieval raramente abordava este tema raro.