jaEnglishOxford Dictionary of Englishja /jɑː / ▸ exclamation South African English informal yes: ‘Let's go swimming.’ ‘Ja!’ ja, this is the life!. – PHRASES ja well South African English informal used as an expression of embarrassment, apology, or world-weariness: ja well, you've seen it all. ja well no fine South African English informal used to express a non-committal, resigned, or ironic attitude.– ORIGIN Dutch.