What is the meaning of ɪ?

a near-close near-front unrounded vowel.

[ɪ]-coloring or a weak, fleeting, epenthetic or echo [ɪ].

a voiceless i sound (IPA [i̥]).

A letter of the Kulango alphabet.

A letter of the draft Pinyin alphabet of the 1950s; corresponds to the modern obscure i that occurs after the letters c z c and ch zh sh r. Not distinguished in capital case.

Source: wiktionary.org