What is the meaning of ص?

Arabic letter ṣād

The fourteenth letter of the Arabic alphabet. It is preceded by ش (š) and followed by ض ().

Y, unknown variable.

a.m., before noon (abbreviation of صباحا)

The eighteenth letter in traditional abjad order, which is used in place of numerals for list numbering (abjad numerals). It is preceded by ف (f) and followed by ق (q).

The 38th sura (chapter) of the Qur'an.

The twenty-seventh letter of the Balti alphabet, written in the Perso-Arabic script

The twenty-sixth letter of the Burushaski alphabet, written in the Perso-Arabic script

The twenty-seventh letter of the Khowar abjad.

The nineteenth letter of the Xiao'erjing abjad.

The twenty-fifth letter of the traditional alphabet chart of Kashmiri.

The fifteenth letter of the Malay alphabet, written in the Arabic script.

The twenty-fourth letter of the Pashto alphabet.

The seventeenth letter of the Perso-Arabic alphabet. It is preceded by ش and followed by ض. Its name in Iranian Persian is صاد, in Dari its name is صواد.

The twentieth letter of Punjabi in the Shahmukhi script.

The thirty-first letter of the Sindhi abjad.

The twentieth letter of the Urdu abjad.

Source: wiktionary.org