Definitions of dot:

• noun:   the shorter of the two telegraphic signals used in Morse code
• noun:   a very small circular shape

  Example: "Draw lines between the dots"

• noun:   the United States federal department that institutes and coordinates national transportation programs; created in 1966
• noun:   street name for lysergic acid diethylamide
• verb:   scatter or intersperse like dots or studs
• verb:   mark with a dot

  Example: "Dot your `i's"

• verb:   make a dot or dots
• verb:   distribute loosely
• name:  A female given name (rare: 1 in 50000 females; popularity rank in the U.S.: #2521)