What does "high time" mean?

A point in time at which something is considered to be utterly due or even overdue to occur; well past time.

What is a synonym for "high time"?

Common synonyms include: action, ball, belatedness, big time, due season, eleventh hour.

noun

noun ·Rare ·Advanced level

Noun

1
A point in time at which something is considered to be utterly due or even overdue to occur; well past time. idiomatic, uncountable
""But it is high time for me to have done with the argument, as it is to be judged of according to scripture evidence.""
2
nearly past the time when something should be done wordnet
3
A very enjoyable or exciting experience or period of time. countable, idiomatic
"[T]here's going to be a high time in the Blue City tonight. We'll have music and dancing and eating."

""But it is high time for me to have done with the argument, as it is to be judged of according to scripture evidence.""