What is the meaning of Alef?

Alternative form of aleph.

the Hebrew letter א

aleph (first letter of the Hebrew and Phoenician scripts and the Northwest Semitic abjad)

aleph, specifically:

1. the name of the Phoenician-script letter 𐤀
2. the name of the Hebrew-script letter א

the name of the Phoenician-script letter 𐤀

the name of the Hebrew-script letter א

aleph (first letter of the Hebrew alphabet)

alternative form of álef

Source: wiktionary.org