Meaning: Relaxed. Peaceful. Free from disturbance; calm.
Synonyms: Peaceful, calm, calming, still, serene, placid, restful, quiet,relaxing, undisturbed, limpid, pacific.
In Hindi: शांत, अक्षोभ.
Use: The yoga instructor will show us the best way to reach a tranquil state.
In some libraries use of mobile phone is restricted in order to keep them quiet and tranquil.
Let thine occupations be few if thou wouldst lead a tranquil life.