Kasi \k(a)-si\ as a girl's name (also used as boy's name Kasi), is a variant of Acacia (Greek) and Casey (Irish, Gaelic), and the meaning of Kasi is "thorny tree; alert, watchful".

The baby name Kasi sounds like Kaysi, Kasie, Kasci, Kaci, Casi, Kassi, Kasy, Kass, Kasia and Kas. Other similar baby names are Kadi, Kari, Kati, Kai, Kali, Kami and Kani.