noontime

plural noontimes

1. Noon.

   Synonyms: high noon

2. Approximately noon.

   the noontime hours

3. figurativelyThe time at which something peaks in some way (e.g., in vitality, in influence, in reknown) (by analogy with the waxing of the sun each day).

   1 more example

   We should so organize our rank and mobilize our forces that our influence may not be dissipated before the advancing hosts of quackery and ignorance. This we can do effectively if only the wise and successful ones among our leaders can be induced to forgo the dolce far niente of the noontime of their lives.

   1890, J.W. Collins, “Society proceedings of the Colorado State Medical Society”, in The Omaha Clinic, volume 3, number 5, retrieved 20 Mar 2021, page 131