Definitions of Vietnamese:

• noun:   the Mon-Khmer language spoken in Vietnam
• noun:   a native or inhabitant of Vietnam
• adjective:   of or relating to or characteristic of the people of Vietnam

  Example: "Vietnamese boat people"

• adjective:   of or relating to the vietnamese language

  Example: "Vietnamese tones"

• adjective:   of or relating to Vietnam

  Example: "The Vietnamese countryside"