(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.