noon

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high noon

1. Literally, at or very near midday (noon). It's only 9 AM and the heat out here is sweltering; by high noon, that sun will be deadly.
2. The peak or most advanced stage of a given period. At the high noon of the economic boom, people spent money on the most ridiculous things. The actor had been a household name at the high noon of his career, but nowadays, there are few who even remember him.
3. The critical or appointed time of a decisive confrontation, crisis, or contest. It's high noon for these two teams, as the result of this game will determine who makes it to the finals.
See also: high, noon

morning, noon, and night

if you do something morning, noon, and night, you do it most of the time They've been working morning, noon, and night to finish the decorating before the baby's born.
See also: and, night