What is the meaning of ?

A vowel of the Devanagari script. Its matra, used to modify the inherent vowel in a consonant is written ि. For example the first consonant क with the matra looks like: कि. The matra should appear before the consonant it modifies, though it is pronounced after.

The third vowel in Dhivehi, written in Devanagari script

the third vowel in Hindi

The third vowel in Marathi.

The third vowel in Nepali.

base of the nominative and accusative singular dual and plural of the demonstrative pronoun इदम् (idam), ‘this’ or ‘that

Source: wiktionary.org