Noun
Usually written in kana
1. idiot; moron; fool
余計なこと言うな、バカ。Don't say things you don't need to, idiot.
Adjective (な)
Usually written in kana
2. stupid; foolish; dull; absurd; ridiculous
どうしてこんなバカなことを！Why would you do something so stupid?!
Adjective (な)
Noun
Usually written in kana
3. trivial; insignificant; disappointing
4. malfunctioning; defective; losing sensation
Noun
Slang
Usually written in kana
5. incredibly; unusually; exceptionally
Adjective (な)
Noun
Slang
Usually written in kana
6. fervent enthusiast; nut; person singularly obsessed with something
usu. in compounds
Noun
Abbreviation
Usually written in kana
7. Mactra chinensis (species of trough shell)