Definition of climaxes:
(n) :
(narratology) The culmination of a narrative's rising action, the turning point.
(n) :
(now often) A culmination or acme: the last term in an ascending series, particularly:
(n) :
(euphemistic) The culmination of sexual pleasure, an orgasm.
(n) :
(originally rhetoric) A rhetorical device in which a series is arranged in ascending order.
(n) :
(ecology) The culmination of ecological development, whereby species are in equilibrium with their environment.
(v) :
(ambitransitive) To reach or bring to a climax (in any sense).