The definition of safe is free from risk, danger, harm or damage.(adjective)
An example of safe used as an adjective is the phrase "safe haven," which means a place where people can go if there is an emergency.
Safe is defined as a storage place for valuables, usually locked and made of metal.(noun)
An example of a safe is a locker.
See safe in Webster's New World College Dictionary
Origin: ME sauf < OFr < L salvus, akin to salus, health, sound condition < IE base *solo-, whole, well-preserved > Gr holos, whole, Sans sarva, unharmed, whole
Origin: altered (after the adj.) < earlier save < save
See safe in American Heritage Dictionary 4
adjective saf·er, saf·est
Origin: Middle English sauf
Origin: , from Old French
Origin: , from Latin salvus, healthy; see sol- in Indo-European roots.
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