Dot

1. A small, round spot.

   a dot of colour

2. (grammar) A punctuation mark used to indicate the end of a sentence or an abbreviated part of a word; a full stop; a period.
3. A point used as a diacritical mark above or below various letters of the Latin script, as in Ȧ, Ạ, Ḅ, Ḃ, Ċ.
4. A symbol used for separating the fractional part of a decimal number from the whole part, for indicating multiplication or a scalar product, or for various other purposes.
5. One of the two symbols used in Morse code.
6. A lump or clot.
7. Anything small and like a speck comparatively; a small portion or specimen.

   a dot of a child

8. A dot ball.
9. Buckshot, projectile from a "dotty" or shotgun

1. To cover with small spots (of some liquid).

   His jacket was dotted with splashes of paint.

2. To add a dot (the symbol) or dots to.

   Dot your is and cross your ts.

3. To mark by means of dots or small spots.

   to dot a line

4. To mark or diversify with small detached objects.

   to dot a landscape with cottages

5. To punch (a person).

preposition

Dot product of the previous vector and the following vector.

noun

A dowry.