everyone

• every one (archaic or when referring to every person or thing in a group separately, not as a group)
• arrywun (Bermuda)

From Middle English everichon. By surface analysis, every +‎ one.

• IPA^(key): /ˈɛv.ɹi.wʌn/

• Audio (US):

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everyone

1. Every person.
   • 1847 October 16, Currer Bell [pseudonym; Charlotte Brontë], chapter II, in Jane Eyre. An Autobiography. […], volume II, London: Smith, Elder, and Co., […], →OCLC, page 32:

     She was really hungry, so the chicken and tarts served to divert her attention for a time. It was well I secured this forage; or both she, I and Sophie, to whom I conveyed a share of our repast, would have run a chance of getting no dinner at all: every one down stairs was too much engaged to think of us.

   • 1904–1907 (date written), James Joyce, “An Encounter”, in Dubliners, London: Grant Richards, published June 1914, →OCLC, page 22:

     Everyone’s heart palpitated as Leo Dillon handed up the paper and everyone assumed an innocent face.

   • 2016, VOA Learning English (public domain)‎^[1], archived from the original on 30 September 2017:

     Hello, everyone!

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• Spelled every one when referring separately to every person or thing in a specified group: There were three patients and she helped every one [of them]. In such cases it cannot be replaced with everybody without changing the sense.
• Everyone takes a singular verb: Is everyone here?; Everyone has heard of it. However, similar to what occurs with collective or group nouns like crowd or team, sometimes a plural pronoun refers back to everyone which is also reflected in verb conjugations: Everyone was laughing at first, but then they all stopped. / Everyone has a smart phone nowadays, don't they?
• In colloquial speech it is common to say everyone is not X instead of not everyone is X (both of which may potentially have the intended meaning that most people are not X). The same is true of other universal qualifiers such as everybody, everything, all.

• (every person): everybody, the world and his wife

• (antonym(s) of “every person”): no one

• Thesaurus:quantifier

• “everyone”, in OneLook Dictionary Search.