What is the meaning of the word "safe"?

Definitions:

a ventilated or refrigerated cupboard for securing provisions from pests noun
- I placed all my flour in the kitchen's safe.
contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse noun
- I made sure to wear a safe when with a new partner.
financially sound adjective
- I made a safe investment by buying coal.
free from danger or the risk of harm adjective
- I had a safe trip across the ocean.
having reached a base without being put out adjective
- The batsman was declared safe by the umpire.
strongbox where valuables can be securely kept noun
- There is a safe in the closet that contains all my gold bars.