kiasi adjective 1noun 1forms 3 adjective1 •(informal, disapproving) Unwilling to take a risk for fear that something bad or unfavorable will happen; cowardly, overly cautious and risk-averse.Why are you so kiasi? You won't die from getting a small cut on the finger.If everyone dares to bungee jump, why can't you do the same? Are you kiasi or what? noun1 •(informal, disapproving) A kiasi person.Apart from the kiasis and kiasus, there are also Singaporeans at the other end of the scale – the healthcare workers who put their lives at risk. — 2003 formskiasis · more kiasi · most kiasi