What is the meaning of ʌ?

an open-mid back unrounded vowel.

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

A wildcard for any vowel, or for a vowel of uncertain quality.

A letter of the Cora alphabet.

A letter of the Nankina alphabet.

A letter of the Northern Tepehuan alphabet.

Source: wiktionary.org