|Origin:||sanitas 'health, sanity', from sanus; SANE|
the condition of being mentally healthy [≠ insanity; ↪ sane]:
I began to doubt his sanity.
She wondered if she was losing her sanity.
when someone or something is being reasonable and sensible [↪ sane]:
Sanity appears to be returning to the stock market.
regain/get back/recover your sanity
I took a vacation to try to recover my sanity.