Cadette \c(a)-dette, cad(et)-te\ as a girl's name is of French origin, and the meaning of Cadette is "younger". The French word is also the source of the term for students at West Point.
A baby name that sounds like Cadette is Giuditta. Other similar baby names are Nadette, Cadee, Caretta, Claudette, Colette, Cosette, Cozette, Idette, Odette, Vedette and Vidette.