Safe/seɪf/ Definition 1 of 5Pro Tip 1/3Physical Safety Refers to being protected from physical harm or danger. The lifeguard ensures everyone is safe at the pool. Pro Tip 2/3Emotional Security Can also mean someone feels emotionally secure and not threatened. She felt safe enough to share her secrets with him. Pro Tip 3/3Reassurance Often used to reassure someone of their security or well-being. Don't worry, your family is safe after the storm.