Definitions of safe:

• noun:   strongbox where valuables can be kept safe
• noun:   a ventilated or refrigerated cupboard for securing provisions from pests
• noun:   contraceptive device consisting of a thin rubber or latex sheath worn over the penis during intercourse
• adjective:   free from danger or the risk of harm

  Example: "A safe trip"

• adjective:   in safekeeping

  Example: "Your secret is safe with me"

• adjective:   of an undertaking
• adjective:   financially sound
• name:  A surname (very rare: popularity rank in the U.S.: #36964)