What is the meaning of ألف?

Name of the first letter of the Arabic alphabet (ا / ‍ا).

thousand

to be or become familiar with, to become accustomed, to share the yoke, to be or become amicable or tame

verbal noun of أَلِف (ʔalif) 

to unite, join, combine, put together

to unite with the rest of the subjugated animals of man, to make familiar, to accustom, to tame

to compile, compose, be the author of (a book)

to form

أُلْفِ (ʔulfi) /ʔul.fi/: first-person singular non-past active jussive of أَلْفَى (ʔalfā)

أُلْفَ (ʔulfa) /ʔul.fa/: first-person singular non-past passive jussive of أَلْفَى (ʔalfā)

أَلْفِ (ʔalfi) /ʔal.fi/: second-person masculine singular imperative of أَلْفَى (ʔalfā)

thousand

thousand

to author, to compose

to invent or come up with (a story)

thousand

Source: wiktionary.org