Climax

Etymology

From Greek "klimax" (ladder), from "klinein" (to lean). It entered English as a term of rhetoric for a series of phrases mounting in force, rung by rung, and only later came to mean the summit of that ascent — the top of the ladder rather than the climb.

noun · /KLY-maks/
The point of highest intensity or the decisive turning point in a sequence of events.
What it names
The peak toward which a story or process builds — the moment everything before was leading to and everything after descends from.
Example
The trial reached its climax when the witness everyone had written off changed her story.
Related idea
The climax is the peak of tension; the denouement is the unwinding that follows it, where consequences settle and loose threads are tied — the descent after the summit.
noun · /KLY-maks/
The peak of sexual excitement; orgasm.
What it names
the physical peak of sexual arousal
Example
The term is used clinically for the climax reached in the sexual response cycle.
Related idea
It is a spike of intense bliss — but by definition a fleeting one, not the settled kind.
noun · /KLY-maks/
In ecology, the stable, mature community of plants and animals a habitat reaches at the end of succession.
What it names
the endpoint of ecological succession
Example
Left undisturbed for centuries, the abandoned field will advance through stages to a climax forest.
Related idea
The climax community is where the local food chain settles into its most complex and durable form.