Everyone refers to every person or every individual within a group or population. It is an inclusive term that encompasses all individuals regardless of their characteristics, attributes, or backgrounds.

"why" can be compared to an old Latin form qui, an ablative form, meaning how. Today "why" is used as a question word to ask the reason or purpose of something. This use might be explained from a formula such as "How does it come that ...". If you meet an old friend of yours, whom you never expected to meet in town, you can express your surprise by saying: Why, it's Jim! This why in the ...

The meaning of EVERYONE is every person : everybody. How to use everyone in a sentence.

(Definition of everyone from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

Care should be taken to distinguish between everyone as a single word and every one as two words, the latter form correctly being used to refer to each individual person or thing in a particular group: every one of them is wrong

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 definition: every person; everybody. See examples of everyone used in a sentence.

each or every person, as in "Everyone enjoyed the party" or "Not everyone voted in this year's elections"