A critical stage or decisive point; a turning point.
The period of life that leads up to and follows the end of menstruation in women; the menopause.
A period in human life in which some great change is supposed to take place, calculated in different ways by different authorities (often identified as every seventh or ninth year).
Pertaining to any of several supposedly critical years of a person's life.
Critical or crucial; decisive.
Climactic.
Relating to a period of physiological change during middle age; especially, menopausal.
The basis of something.
A stone laid during the construction of a (usually important) building, the laying of which is usually marked by a ceremony.