Definitions of urbane:

• adjective:   characterized by tact and propriety
• adjective:   marked by wide-ranging knowledge and appreciation of many parts of the world arising from urban life and wide travel

  Example: "Urbane and pliant...he was at ease even in the drawing rooms of Paris"

• adjective:   showing a high degree of refinement and the assurance that comes from wide social experience

  Example: "Maintained an urbane tone in his letters"