Definitions of upright:

• noun:   a piano with a vertical sounding board
• noun:   a vertical structural member as a post or stake

  Example: "The ball sailed between the uprights"

• adjective:   in a vertical position; not sloping

  Example: "An upright post"

• adjective:   maintaining an erect position
• adjective:   upright in position or posture

  Example: "He sat bolt upright"

• adjective:   of moral excellence

  Example: "An upright and respectable man"

• adjective:   erect in posture
• name:  A surname (very rare: popularity rank in the U.S.: #25947)