Contemplative (adjective)

1. Engaged in deep thought or quiet contemplation.
2. Relating to or characterized by contemplation.

Origin:

Late middle english: from latin contemplativus, from contemplari "observe attentively", from con- "completely" + templum "a place for observing".

Examples:

1. He had a contemplative expression on his face.
2. She was a contemplative person who enjoyed solitude.
3. The contemplative atmosphere of the monastery was perfect for meditation.
4. The contemplative mood was broken by the sudden noise.
5. The contemplative music helped him to relax.