1. a feeling of listlessness, dissatisfaction, and world-weariness; lack of interest or enthusiasm
After years of traveling, he felt a sense of ennui about visiting new places.
Após anos viajando, ele sentia um tédio profundo em relação a visitar novos lugares.
2. a state of apathetic fatigue and disillusionment, often accompanied by melancholy
The artist's work reflected the ennui of modern urban life.
A obra do artista refletia o tédio da vida urbana moderna.