What is the meaning of ب?

The second letter of the Arabic alphabet, called بَاء (bāʔ) and written in the Arabic script.

The second letter in traditional abjad order, which is used in place of numerals for list numbering (abjad numerals). It is preceded by أ (ʔ) and followed by ج (j).

Abbreviation of باب (bāb, chapter).

denotes an instrument or tool, with, by (a means)

denotes the agent of unaccusative forms

denotes accompaniment

with (a component)

with (a quality); in (a state)

denotes proximity, with, to, next to, at (touching on, connected with, concerning)

denotes inclusion, surrounding, or location, within (a place); in; on; at

denotes requital, giving or doing in return; for

marks the predicate of a negative copula

The second letter of the Balti alphabet, written in the Arabic script.

The second letter of the Brahui alphabet, written in the Arabic script.

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

The third letter of the Central Kurdish alphabet, called با (ba) and written in the Arabic script.

The second letter of the Hijazi Arabic alphabet, called بَاء and written in the Arabic script.

-ing (prefix indicating the present continuous tense)

with, by (a means)

The second letter of the Khowar alphabet, called بے and written in the Arabic script.

The second letter of the Kyrgyz alphabet, called بە and written in the Arabic script.

Arabic spelling of bi (by)

The second letter of the Ottoman Turkish alphabet, called با and written in the Arabic script.

with

at; in

to; into

for; because of

The second letter of the Pahari-Potwari alphabet, called بے (be) and written in the Arabic script.

in, at, on

with, by means of

prefix indicating the present tense

with

The second letter of the Xiao'erjing abjad.

The second letter of the Egyptian Arabic alphabet, called به and written in the Arabic script.

The second letter of the Gujarati alphabet, called بے and written in the Arabic script.

The second letter of the Kashmiri alphabet, called بے () and written in the Arabic script.

The second letter of the Kazakh alphabet, called با and written in the Arabic script.

The second letter of the Malay alphabet, called باء and written in the Arabic script.

The second letter of the Pashto alphabet, called بي and written in the Arabic script.

The second letter of the Persian alphabet, called به or بِ and written in the Arabic script.

The second letter of the Punjabi alphabet, called بے (be) and written in the Arabic script.

The second letter of the Sindhi alphabet, written in the Arabic script.

The second letter of the Urdu alphabet, called بے (be) and written in the Arabic script.

The third letter of the Uyghur alphabet, called بە (be) and written in the Arabic script.

The second letter of the Yoruba alphabet, written in the Arabic script.

Source: wiktionary.org