[en-ee-wuhn, -wuh n]
any person at all; anybody: Did anyone see the accident?
Origin of anyone
Anyone as a pronoun meaning “anybody” or “any person at all” is written as one word: Does anyone have the correct time? The two-word phrase any one means “any single member of a group of persons or things” and is often followed by of: Can any one of the members type? Any one of these books is exciting reading. Anyone is somewhat more formal than anybody. See also each, they.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
any person; anybody
(used with a negative or a question) a person of any importanceis he anyone in this town?
(often preceded by just) any person at random; no matter who
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Online Etymology Dictionary, © 2010 Douglas Harper