ambi adjective 1noun 1forms 3 adjective1 •(informal) Ambidextrous.I later began relearning everthing the real "right way," which is to say the left-handed way. I became truly "ambi" in most things I do. — 1997 noun1 •(informal) An ambidextrous person.This with the sickle illustrates the frustration of lefties, but also ambis when their right hand gets tired and want to switch over. — 2000 formsambis · more ambi · most ambi