What is the meaning of ش?

The fourteenth letter of the Acehnese alphabet, written in the Arabic script.

The thirteenth letter of the Arabic alphabet, written in the Arabic script; preceded by س (s) and followed by ص (ṣ).

The twenty-first numeral symbol of the Arabic alphabet (traditional abjad order, used for list numbering), written in the Arabic script; preceded by ر (r) and followed by ت (t).

The twenty-fifth letter of the Balti alphabet, written in the Arabic script.

The twenty-fourth letter of the Burushaski alphabet, written in the Arabic script.

what

regardless of, no matter [with ما]

The twenty-fourth letter of the Khowar alphabet, written in the Arabic script; preceded by س and followed by ݰ.

Negates verbs or occasionally other parts of speech

Extension for triliteral roots that imparts a causative meaning: شَفْعَل (šafʕal; šaCCaC)

Extension for triliteral roots: فَعْلَش (faʕlaš; CaCCaš)

A letter of the Old Ruthenian alphabet, written in the Arabic script.

don't, didn't

The eighteenth letter of the Xiao'erjing abjad, written in the Arabic script.

The thirteenth letter of the Egyptian Arabic alphabet, called شين (šīn) and written in the Arabic script.

Negates a verb. [with ما- (ma-, + verb)]

The twenty-fourth letter of the Kashmiri alphabet, written in the Arabic script; preceded by س and followed by ص.

The twelfth letter of the Kazakh alphabet, written in the Arabic script; preceded by س and followed by ع.

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

The twenty-second letter of the Pashto alphabet, written in the Arabic script; preceded by س and followed by ښ.

The sixteenth letter of the Persian alphabet, called شین and written in the Arabic script; preceded by س and followed by ص.

The nineteenth letter of the Punjabi alphabet, written in the Shahmukhi script; preceded by س (sīn) and followed by ص (ṣwāt).

The thirtieth letter of the Sindhi alphabet, written in the Arabic script; preceded by س and followed by ص.

The nineteenth letter of the Urdu alphabet, written in the Arabic script; preceded by س and followed by ص.

A suffix used in many nouns borrowed from Persian, and also in certain native words. This is a rough equivalent of -tion or -ment, making a noun for the action of the verb.

The fourteenth letter of the Uyghur alphabet, written in the Arabic script; preceded by س and followed by غ.

The twenty-first letter of the Yoruba alphabet, written in the Arabic script; preceded by س and followed by ت.

Source: wiktionary.org