In classical tragedy (and hence in other forms of drama, fiction, etc.): a point in the plot at which a sudden reversal occurs. In extended use: a…

Nautical. figurative. A change or alteration; a vicissitude; esp. a twist of fate or fortune. Frequently in plural with of. Obsolete.

A change or alteration in condition or fortune; an instance of mutability in human affairs.

A change of fortune or circumstances, esp. for the worse.

= peripeteia, n. 1.

The action or condition of passing more or less rapidly and suddenly from one state to another; an instance of this; repeated variation…

The action or an act of twining. A turn of fortune, a vicissitude.

A sudden or marked (esp. untoward) reaction or reversal in trade, fortune, etc.

A change of fortune, fate, etc.; = reverse, n. 5d.