The definition of a Cyrillic letter for this list is a character encoded in the Unicode standard that a has script property of 'Cyrillic' and the general category of 'Letter'.
Variants of Cyrillic are used by the writing systems of many languages, especially languages used in the countries with the significant presence of Slavic peoples.
The tables below list the Cyrillic letters in use in various modern languages and show the primary sounds they represent in them (see the articles on the specific languages for more detail).
Letter forms with a combined diacritic which are not considered separate letters in any language (notably vowels with accent marks which are sometimes used in some languages to indicate stress and/or tone) are excluded from the tables, with the exception of ѐ and ѝ[a].
The highlighted letters are those of the basic (original) Cyrillic alphabet; archaic letters no longer in use in any language today are not listed.