be unsuccessful in achieving one's goal

he failed in his attempt to secure election

they failed to be ranked in the top ten

neglect to do something

the firm failed to give adequate risk warnings

cease to work properly; break down

a lorry whose brakes had failed

a mark which is not high enough to pass an examination or test

a fail grade

a mistake, failure, or instance of poor performance

their customer service is a massive fail

his first product demo was full of fail