Someone/ˈsʌmwʌn/ Definition 1 of 2Pro Tip 1/3Expectation of Familiarity Implies the speaker expects you to know or guess who is being referred to. You'll never guess what someone told me! Pro Tip 2/3Privacy Respect Used to omit identity when it should be kept private. Someone special gave me this gift, but I can't say who. Pro Tip 3/3Unknown Presence Indicates the presence of a person whose identity is unknown to the speaker. I heard someone sneaking around outside.