Dot

Merriam-Webster Online Dictionary
dot (noun)
1.
a small spot - speck
2.
a small round mark as
a) (1) a small point made with a pointed instrument - a dot on the chart marked the ship's position
(2) a small round mark used in orthography or punctuation - put a dot over the i
b) a centered point used as a multiplication sign (as in 6 · 5 = 30)
c) (1) a point after a note or rest in music indicating augmentation of the time value by one half
(2) a point over or under a note indicating that it is to be played staccato
3.
a precise point especially in time - arrived at six on the dot
4.
a short click or buzz forming a letter or part of a letter (as in the Morse code)
5.
a point used to separate components of an address on the Internet
dot (verb)
transitive verb
1.
to mark with a dot
2.
intransitive verb
to intersperse with dots or objects scattered at random - boats dotting the lake to make a dot
dot (noun)
- dowry
DOT (abbreviation)
Department of Transportation