Everyone vs. Every One: What's the Difference?
Quick Answer
everyone = pronoun meaning "everybody" / all people
every one = emphasizes each individual person or thing (often + "of")
Explanation
EVERYONE (one word)
Pronoun = everybody, all people
"Everyone loved the movie."
"Has everyone arrived?"
EVERY ONE (two words)
Each individual one — often followed by "of"
"Every one of the boxes was checked."
"I read every one of his books."
Quick test: Can you replace it with "everybody"? Use everyone. Is it followed by "of" or emphasizing each individual item? Use every one.
Examples
Common Mistakes
Incorrect: Everyone of the cookies disappeared by lunchtime.
Correct: Every one of the cookies disappeared by lunchtime. (each individual cookie)
Incorrect: Every one in the office got a bonus this year.
Correct: Everyone in the office got a bonus this year. (everybody)
Practice
Choose the correct form:
"_____ at the meeting agreed, and _____ of the proposals was approved."